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FAQs about Caulerpa Algae Identification

Related Articles: Caulerpas by Bob Fenner, A closer look at Caulerpa - Common aquarium species and their care by Adam Jenkins, Embracing Biodiversity, Green Algae By Mark E. Evans, Green AlgaeAvoiding Algae Problems in Marine System, Algae Control, Marine Maintenance, Nutrient Control and Export, Marine Scavengers, Snails, Hermit Crabs, Mithrax/Emerald Green Crabs, Sea Urchins, Blennies, Algae Filters, Ctenochaetus/Bristle Mouth Tangs, Zebrasoma/Sailfin Tangs, Skimmers, Skimmer Selection, Marine Algae, Coralline Algae, Green Algae, Brown Algae, Blue-Green "Algae"/(Cyanobacteria)Diatoms, Brown Algae

Related FAQs: Caulerpa Algae 1, Caulerpa 2, Caulerpa 3, Caulerpa 4, Caulerpa 5, Caulerpa Behavior, Caulerpa Compatibility/Control, Caulerpa  Selection, Caulerpa Systems, Caulerpa Nutrition, Caulerpa Disease, Caulerpa Reproduction/Propagation, Other Green Algae, RefugiumsGreen Algae Control 1Marine Algae ID 1, Marine Algae ID 2, Marine Algae Control FAQs II, Marine Algaecide Use, Nutrient Limitation, Marine Algae Eaters, Culturing Macro-Algae; Controlling: BGA/Cyano, Red/Encrusting Algae, Green Algae, Brown/Diatom Algae

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Marine Aquarium Algae Control

by Robert (Bob) Fenner

identification of Caulerpa sp.       11/3/13
sorry to disturb you..
<Not a disturbance>
i would like you to confirm about my identification on Caulerpa sp...
i scared that I'm doing it wrong..
since you are expert with this, i hope you will help me..
i think the first picture is Caulerpa racemosa..is it right??
<The second sent here; yes>
but I'm not sure on the second picture. That species kind confusing me..
<The other? May be C. freycineti... Do you know where the specimen originated? Was it brought in with live rock from the Red Sea? Bob Fenner>
thanks for your help sir..
[image: Inline image 1]
[image: Inline image 2]

Re: identification of Caulerpa sp.      11/4/13
Thanks for your fast reply sir,
No sir,
The specimens are from blue lagoon, port Dickson, negeri Sembilan,  Malaysia.
Is it all that Caulerpa from the same species? ?
What species are they?
<Time to send you to Hans Baensch, Marine Atlas V. 1. Don't send Megs of files to us. B>

What species of macro algae is this?    8/14/13
Hi :)
Would you be able to identify this species of macro algae?
<Mmm, looks much like Caulerpa taxifolia... or a small, fine version of some member of that genus. Have just reviewed the excellent coverage in Baensch, Mar. Atlas v. 1, and this is my best guess>
<And you, Bob Fenner>

Re: What species of macro algae is this?      8/14/13
Hi Bob
Thanks for the super fast response.
Ok to have this as THE only plant life in a small refugium?
<Mmm, do see/read on WWM re the genus. BobF>
Re: What species of macro algae is this?      8/15/13

Will do that
Thanks Bob
<And you, B>

Algae Question Identification, and control    3/22/13
Hi there.
<Hi David. Jordan with you today.>
  Wondering if anyone there knows what type of algae I have  in this picture and what the best clean up crew suggestion for it is.
<Appears to be Caulerpa verticillata. I have read reports of some species of Tangs and Rabbitfish eating it but they are few and far between. I would recommend manual removal. Remove the rock and scrub with a stiff brush. Be sure to remove all of the algae, including all rhizoids/rhizomes, and rinse with clean saltwater before adding back to tank. This will likely take multiple attempts before it is successfully eradicated.  Hydrogen peroxide dips will kill it, but the dip will kill all other life as well.>
 I  have set up a new tank and just finished my cycle with Florida live rock and this stuff is starting to grow out of control.
<That is what Caulerpa does.>
 I am ready to add my  cleanup crew but need to know what will conquer this stuff the best.   I appreciate any help!  I have included some pictures  below.  Thanks!
<Quite welcome.>
  David Rudman
<<Well done Jordan. BobF>>

Re: Algae Question Identification    3/22/13
Thanks Bob!
David Rudman
<Welcome David. BobF>
Re: Algae Question Identification    3/22/13

Jordan said Caulerpa verticillata.  Which do you think is more likely the match?
<I believe his is correct. B>
Re: Algae Question Identification     3/22/13

Just Googled pictures.  It definitely is Caulerpa verticillata. 
<Ah yes>
David Rudman

Unknown Saltwater Plant???   6/20/12
<Afternoon Bill>
I noticed this specimen growing in my Reef Tank about 3 Days ago....  I believe that it is a plant of some sort.....
I have no idea what it is, where it came from, or obviously if it is a positive thing or should I remove it as quickly as possible.....
<A very small piece likely hitch-hiked in.>
I know that the pic is not the best, but I have included one.....  Any ideas???
<Appears to be a species of Caulerpa.  I am fairly certain it is C. racemosa based on the circular fronds and rhizoids; a more defined picture would eliminate any doubt.>
BTW - The tank has been up for 2.5 Years...   50 Gallon Sea Clear System II....  SG is 1.025, Zero for Nitrates, and unable to get a reading for Phosphates....  Water Temp has been a little high  at 78.9 F....
I have not introduced any new inhabitants for at least 3 Months, or Live Rock for approx. 9 Months....  No Refugium....  Protein Skimmer, External Rena Filter XP4, and Power Heads
for moderate flow
Any help would be appreciated....  Any ideas???
<I would remove it but that's your call. Read more on Caulerpa--
http://www.wetwebmedia.com/caulerpaalg.htm >
<Quite welcome.>

Re: Unknown Saltwater Plant???   6/20/12
Hi Jordan,
<Hello Bill>
Just wanted to Thank-you for the quick response....
I will yank the offender ASAP....
<Sounds like a plan, be sure to remove all of the rhizoid.>

Algae ID: Caulerpa sp. 10/1/2009
Hi guys (and gals) I have a green macro growing out of control,
<Hmm.... sounds like a Caulerpa.>
at first I thought mermaids wineglass, but not convinced. This is bright green, grows like a vine and has thousands of "cups" I can not find a picture on web ANYWHERE but wondering if you have any idea.
<Look here http://www.wetwebmedia.com/caulerpaalg.htm for Caulerpa peltata.>
<You can also look here for a close up:
*oE55VjNHz6P4r/PlantaeChlorophytaChlorophyceaeCaulerpalesCaulerpaceaeCaulerpapeltataIMG_0066.jpg >
It looks ok, but just wondering if you know what it is, and if it's a good thing?
,Caulerpas can grow out of control if not managed. Read the linked pages at the top of this page for more information:
http://www.wetwebmedia.com/caulerpaalg.htm >
Let me know if you want a picture I can take!
<Always best to include a picture if you are requesting a ID of something, but do have a look at the linked pages and see if that is it.>
Ren (Sydney, Australia)
<MikeV (Melbourne, Florida)

A few IDs... learning... 9/1/2009
Hello all,
I went to the LFS earlier today and got a hefty piece of LR among other things.
One of the other things I bought was a frag of some sort of coral. I was hoping I could get an ID on it:
<? See WWM re Soft Coral IDs>
There was a huge sale so I decided to see if my system can keep corals.
<? What sort of approach to life-keeping is this?>
Even the employee wasn't sure what it was.
Next question is, what are these jelly blob things that are on my LR?
<... single polyped stony corals... Maybe Caryophylliids>
Lastly, Caulerpa. I have some Caulerpa, I haven't had any problems with it, but I'm mostly positive its Caulerpa toxifolia:
<Mis-spelled, but yes...>
If it is, should I get it out now?
<Please... use WWM for these general questions. Your answers and much pertinent information is archived...>
It hasn't done anything as of yet, but its probably a ticking time bomb...
Here's a different piece of a Caulerpa, not sure what the spp. is though:
<See here: http://wetwebmedia.com/caulerpaalg.htm>
The tank is a 55 Gal with maybe 4 or 5 stalks of the Caulerpa, if that means anything...
Thanks for your time.
<Thank you for learning/using the search tool and indices. Bob Fenner>


Is this a Caulerpa Sp.? 08/24/09
Hi Crew.
<Hi Carlos.>
Thanks for all your past help, the tank is doing great coming up on 3 years.
<I'm glad to hear.>
I recently purchased some Chaeto to restock my refugium. After a few weeks I noted this other algae/plant growing along with it. Actually it is outgrowing it. It has these long leaves which have a bit of a saw-tooth edge to them. It grows along the walls and tends to anchor itself to anything. It grows quite quickly and I keep pruning it back. Any ideas what this could be?
<A serrated form of Caulerpa brachypus (citing from 'The Genus Caulerpa from Central Visayas, Philippines' by Menez & Calumpong: 'erect foliar branches proliferous occasionally, ligulate, 5-40 mm long, 2-4 mm wide, with serrate margins or almost entire in a few specimens, irregularly disposed, 2-15 mm distance apart on upper side of stolon.''¦ Better don't let it get into your display tank.>
I have looked in several books and online and can't seem to find a match.
<Many do not have clear serrations as they are noted in the original descriptions, maybe this is why you did not find a match.>
Thanks for your help. Cheers Carlos
<Welcome. Marco.>

Macro identification -08/05/08 I think this type of macro algae is Saw Blade Caulerpa <'tis so... as far as I can tell from the photo provided.> but I am not sure. I was hoping that you could help me out by identifying what kind of macro algae this is. <Best,
Sara M.>

Macro Algae, Caulerpa ID, contr.   2/15/08 Love your web site - have used it many times. However I am at a loss. Attached are two photos of some macro algae that continues to grow no matter what I have tried. So I was wondering, do you know of anything that will eat this stuff? Thanks for your help. Jeffrey Baxter <Is a species of Caulerpa... Please read here: http://wetwebmedia.com/marine/maintenance/index.htm scroll down to the tray on Algae... read re the Caulerpaceae family, the Division of Greens, their Compatibility/Control... Bob Fenner>

Caulerpa control in a 46gal tank -- 1/2/08 Happy New Year! I found a picture of the Caulerpa that I am having problems with on your site and still am not sure of the exact ID (file is attached). <Looks like C. sertularoides or C. taxifolia...> Other than manual removal requiring removing most of my rockwork (about 30 pounds of LR) what would be a good biological control for a tank of my size. <Please read here: http://wetwebmedia.com/caulerpacomp2.htm and the linked files above> Stocking includes: Fish: 2 false Perc. clowns, 1 green Chromis, 1 blenny that looks like Salarias fasciatus from your section on blennies. Inverts: 1 sand sifting starfish (sandbed is about 3"), some blue and red legged hermit crabs, 1 Mithrax crab, and a mix of snails as well as some polyps. My last parameters were a Sp. Gravity of 1.025, pH 8.3 Ammonia 0.25ppm Nitrite 0ppm Nitrate 0ppm Ca 300ppm <A bit low> Phosphate 0ppm (last tested 3 weeks ago). <Nutrients listed and more are likely being absorbed...> Temperature stays between 78 and 82 degrees. Water changes of 3 gal a week with RO from LFS. <I'd get, use your own> Equipment includes a remora pro Mag 3 which replaced a SeaClone 100 last week, <Much better> a penguin 350 and penguin 200 without BioWheel and for lighting a current nova extreme T5HO with actinics on for 10 hours and 10000K lights for 8 hours on a timer. I am trying to keep it relatively simple, but nothing seems to be putting a dent in this algae and I am at a loss. Ronde
<Get reading... Bob Fenner>

Caulerpa ID Hi Bob <Alois> I was wondering if you can help, I am trying to id this Caulerpa, it is imposable. maybe you can help. It was found in new Zealand in a aquarium. http://www.reefcentral.com/forums/showthread.php?s=&threadid=1270658 regards Alois <Looks like C. verticillata to me... from the flat lamina and bifurcated tips... Is a Caribbean form I believe. BobF>

Re: Caulerpa ID, ongoing poor English HI Bob, Thanks for the reply I had a look, its not C. verticillata Does not look like it in any of the photos I looked up. regards Alois <... Please... fix your English before sending messages... And look at Hans Baensch Marine Atlas v. 1. RMF>

Re: Caulerpa ID Thanks for the email Bob. <Welcome> Here is a close up attached. <Ahh, thank you for this. Am more convinced this is Caulerpa verticillata> I will have to find the book you mentioned as I don't have it Regards <BobF>

Re: Caulerpa ID  12/19/07 Hi Bob, <Alois> Sorry I did not mention any book as that is what you referred me too. I have been looking on the Net and found that Caulerpa webbiana Montagne could also be a possibility as I am in New Zealand and Caulerpa webbiana Montagne is found here <Well... the genus has quite a range of "morphological types" by species... a high flexibility in expression determined by local conditions... I am still in favor of the C. verticillata ID... it could be a transplant. BobF> Regards

Algae ID - Caulerpa Taxifolia   3/19/07 Evening Crew! <Hi Jeff!  Mich with you this afternoon.> Not to duplicate, but I sent this and my system crashed so I don't know if it went through or not. <Is here now.> So.....I have attached three pics of an algae growing quite well in my tank. <I see them.> I can only ID it as a Caulerpa, just not sure what variety.  It resembles C. taxifolia, but I need a positive ID from you....hopefully!   <Does appear so.> If it is taxifolia, do I need to get it out ASAP? <Yep at the very least isolated in the sump with lighting 24 hours per day to prevent if from sexually reproducing.  More here and the links in blue: http://www.wetwebmedia.com/caulerpaalg.htm> Thanks for you help!
<Welcome!  Mich>
Algae ID - Caulerpa Taxifolia   3/19/07 Good evening Crew! <Hi Jeff, Mich here.> I sent some pics yesterday and I am concerned that I may have crashed your server as I have not had a response yet. <Our server has been down, but not your doing.> I have down sized them and hopefully you can see them. I know this is a form of Caulerpa, just not sure what variety. <Yes, your ID appears to be correct.> I do want to get is out of the tank if it is not beneficial. <It's not that it's not beneficial, is an excellent nutrient exporter, just can have some unwelcome consequences.> I plan to add a refugium with Chaetomorpha within a month or so and am guessing this will need to be gone by then. <I personally would choose the Chaetomorpha.> Thanks again for your help!

Caulerpa prolifera - 09/08/06 I'm looking for Caulerpa for my sump (to use with Miracle Mud).  Just wondering if Prolifera is the same stuff.  I have prolifera growing in the main tank. <<Prolifera is likely the most common species of Caulerpa available>> Thanks, James <<Regards, EricR>> Caulerpa Invasion - 02/18/06 Dear crew member, <<EricR here>> I have a nuisance algae in my tank which (after searching this site and Algaebase) I believe is Caulerpa nummularia - there is also a photo of it on your site, under the heading Marine Algae ID 9.  The email is entitled Algae ID 12/17/05.  It is the photo on the bottom left. <<Yes, I see it.>> The thing is, there doesn't seem to be an abundance of information about it out there - or at least, with my amateur research skills, I can't find it. <<Hmm...a Google search re seems to bring up quite a few "hits"...though only working through them will determine if there is any useful information.>> What I do know is that it spreads like bird flu and seems impossible, short of a tank tear-down, to eradicate. <<All the Caulerpa species can be very difficult to remove once entrenched.>> Do you think a tang species might eat it? <<Maybe...but I think a Foxface would be a better choice.>> I don't know if it's toxic or not.  Any help you can give me would be greatly appreciated. <<Have a look here, I think you'll find it of interest:   http://reefshow.com/html/modules.php?name=AvantGo&file=print&sid=144 >> Thanks, Melinda <<Regards, EricR>> 

Algae identification and removal 02-05-06 Hi, <Hello> I have a large amount of what appears to be Caulerpa growing in my tank. Today while fumbling through your archives I read that some Caulerpa can give off toxins, which surprised me. <All algae can actually> So I looked through all your algae identification pages, and I found nothing. <Surprising> A close match is Caulerpa racemosa, but I don't think that is it. <Is what this looks like to me> I will be attaching a picture of it. Just in case it did not go through, which it may very well not, I will give a quick description. As all Caulerpa it is based on a vine. On the vine "bubbles" shoot out along the vine. Unlike Caulerpa racemosa, there are two bubbles on opposite sides of the vine, then go up 1/2cm the vine and there are two more "bubbles" on opposite sides of the vine and this continues. So my questions are what is this? And is it a danger to my tank? <In large (relative) quantity, possibly> By the way my yellow tang will not touch it, this leads to my theory of it being undesirable. If I need to remove it what is the best way to do it. Remove it all at once? <If you want> Or remove it over the period of a few days due to the possibility of releasing excessive toxins into the water? <Oh! If you want to remove it entirely, try to take it out all in one go... along with a water change, use of carbon...> Sorry for the lengthy question? <No worries. Bob Fenner>
Thanks much,

Re: Caulerpa query   2/24/06 Hi Bob, <David> I an trying to resend a pic of the Caulerpa and also of the unidentified algae. <Got them... both appear to be Caulerpa spp.> I am one of those who seen to have a problem getting queries through with attachments so we'll see what happens.  I have searched WWM for an ID on the second algae to no avail. Thanks David <The second may be C. pinnata... See the Net or Baensch V. 1 Marine Atlas, p. 302... perhaps C. flagelliformis in its "small" stage. Bob Fenner>

Macro algae ID confirmation 1/28/04 Hey, I just got some macro algae from where I used to work the people there told me that it was illegal to sell because it was taking over the reefs, or something to that effect, <This is not accurate.  Some Caulerpa species are illegal to possess in California because they are non-native and have been found growing in local waters.  The same Caulerpas have been found in the Mediterranean and in Australia.  Some folks have argued that these Caulerpas have taken over habitat and displaced native species.  Others have argued that the Caulerpa only invades areas that have been badly damaged by pollution, and that its presence actually helps control the pollution and creates new habitat for other critters.  They also assert that once the pollution is controlled by the Caulerpa, it dies back paving the way for native species to re-establish themselves.  In any case, the type you have is not one of the illegals, and even if it was, there is no Caulerpa Gestapo going door to door looking for secret stashes.  As with any marine organism, please do dispose of any excess responsibly.  Please do not put it down drains or into the ocean.  Letting it dry out in your garden, compost pile or back yard or putting it in the trash are all fine.> so he just gave me a handful some people have told me that it is just razor Caulerpa , but I want to be positive enclosed is a picture of the algae, and I hope that you can make a positive id  btw....if you need a better picture, just let me know <The pic is fine.  This is what is commonly called "razor Caulerpa".  I would recommend strongly AGAINST allowing this to become established in a display aquarium.  Not many Caulerpas are very palatable to fish, and this is among the least so, making it very hard to control.  I have not found any fish that will eat it.  In terms of utility in refugia, I would consider this Caulerpa to be average in terms of growth rate and tendency to "go sexual" or crash.  HTH.  Adam>

Caulerpaceae Greetings Bob, I must commend you and the others for putting together such a extensive and informative site. I have recently read your article GREEN ALGAE OF THE FAMILY CAULERPACEAE. In the first paragraph you mention that Caulerpa has the largest (I assume by volume) cell in the algae order. I am under the impression that this excludes Chara the freshwater algae. Correct me if I am wrong. Thanks, <I do think (and this is not an original assessment... as are likely any!) that Caulerpa are the largest single cell organisms (even more than ostrich eggs) in the world including (have removed a bunch of the green algae genus) Chara.> Devoted fan of your work Nathan LaVoy B.S. Biology <Be chatting, Bob Fenner>

First question is about Caulerpa. What is this and what is it used for. My assumption is that it absorbs some nitrates. Is it a good thing to add to a tank? <Caulerpa is a large genus of Green Algae, found in shallow waters throughout the tropical seas. They do absorb nitrates, phosphates, more... and make oxygen, release other chemicals of benefit to captive systems... All good things for your tank> Second - I just purchased a long tentacled anemone because the maroon gold striped clown I wanted was firmly attached to him. Any information you can give me to give this guy (the anemone) the best chance possible for survival would be greatly appreciated. I only have regular fluorescent lighting right now, but have a 250 watt metal halide retrofit kit on the way (should be here within the week). Also, are there any additives that would help (I use Kent Coral-Vite)? <Hmm, don't know if I'm following you here... the animal is photosynthetic... needs more light... now... no additives... some folks purposely feed the large anemones found in symbioses with Clownfishes... others rely on the fish feeding their anemone and incidental foods blowing into the anemone...> tank stats: 55 gallon tank 1 30 watt daylight fluorescent (PowerGlo) 1 15 watt daylight fluorescent (PowerGlo) 1 15 watt blue actinic 1 250 watt metal halide w/6700k bulb on the way) 1 Emperor 400 (carbon media removed and bio beads added to extra media basket) 1 Emperor 280 (also modified as above) 1 20" venturi skimmer (purchased from FFExpress) ~20 to 25lbs of Marshall Island live rock. I hate killing things, let me know if this is sufficient. Thanks!!!!! >> I would "look, before you leap/purchase" going forward... these anemones aren't easy to maintain... and can cause real problems if they die suddenly, get sucked up against an intake.... Bob Fenner

Mexican Caulerpas  I was wondering if you could help me. We have recently noticed some green algae growing in our 75 gallon reef tank. This algae appears to be almost feather looking. It only grows in certain areas of the tank. Is this normal?  <Yes, and yes... Algae, as in life "happens" where there are propitious to allowable conditions... a good sign really> If not what can I do to permanently remove it. <Permanently? Nothing... But much can be done to help control it> I was told that this was Mexican Caulerpas and it was a good thing to have. I would like to get any information you can on this. Also will this stuff need to be controlled??? If so is there some kind of fish or something that will eat it?? Thanks for any help you may offer. Debbie  <Please read through the materials constantly being added to on the topics of Marine Algae, Caulerpas (there's a pic of mexicana there if memory serves), Algae Control... and related FAQs files. Bob Fenner>

Bubble Algae? Bob, I have a type of algae that started growing out of my live sand and I am trying to make a determination as to what it is. It has small pearl shaped green bubbles growing on a stalk that is also green and what looks like roots coming off of the stalk. I did some research on your site and the web and found a Caulerpa that is close to it (grape Caulerpa), however, there are still some differences in the way the pictures of the grape Caulerpa I have found on the web look when compared to what's in my tank. The bubbles growing on the stalk do not strand up like some of the grape pictures I have seen. Approximately every half an inch on the stalk, there is a spot where there is a small limb with three or four bubbles attached. Could this actually be Valonia or something similar and should I remove it? <Could be... and there is tremendous variation in these species with varying conditions (light, nutrient, current...) in captivity... Removal? I would leave it unless it's growing too much, unattractive to you> The only thing I have found about Valonia is that it usually grows in clumps or as a single bubble, but not on stalks like other macro-algae.  <Usually, yes> I actually didn't have much concern over the matter until today at lunch I noticed a small clump of three bubbles attached to a piece of live rock for the first time. I immediately removed the piece of rock and the bubbles from it. Again I wasn't sure if this was actually bubble algae either since the coloration of the algae on the rock was similar to that which is growing on the stalk. Also, from what I have seen, most Valonia appears to be a deep green (almost metallic) color. This algae is more of a true green and not as deep and shiny as the pictures I have seen. Any ideas? <Lots... but not much about this situation... as I say/state, no reason to be overly concerned... you can add Mithrax Crabs... physically remove this material at a later date if it proves to be too vigorous. Bob Fenner> Thanks for your help, Chad

Re: Bubble Algae? Thanks for your help. I managed to get a couple of pictures of the algae in question. I thought that might help with the identification. Right now it doesn't appear to be growing at what I would consider an alarming rate, but I think it will require some pruning soon. Other than the clump of bubbles I found on that piece of rock yesterday I haven't seen any indication that it is spreading anywhere the vine is not present. <Ah, good news to report... this is almost undoubtedly a stand of Caulerpa racemosa... we have images of this species on the "Caulerpa Algae" sections on our website: www.WetWebMedia.com... can be easily "pinched" at whatever point you want to contain it and removed... a beneficial species. Bob Fenner>

Re: Bubble Algae? Whew!!!!!! Thank you very much! <You're welcome my friend. Bob Fenner>

Can you identify this ? My local fish store said they could not make it out. My new Naso Tang won't touch it, but I think it's kinda cool any way. Thanks in advance for any insight you can give me as to it's nature. You are a great friend to the hobby and this hobbyist. <Hmm, a species of Caulerpa... likely C. taxifolia. See this part of our site, images: http://wetwebmedia.com/caulerpaalg.htm Bob Fenner>

Tumble weed algae Hi Bob, I removed the bio balls from my wet/dry and replaced with live rock and tumble weed algae, want to reduce nitrates, currently at 25PPM, can't seem to get lower then this. I have about 25 lbs of live rock in my 54 gal FO tank. <More rock will help... as would a deeper, finer substrate... but is there a concern at 25 ppm of nitrates?> Is tumble weed algae considered macro algae, it is multiplying quite well in my sump, I have a light going 24 hours on the sump. When and how much live rock or algae do I need to get the nitrates to go lower then 25PPM ? <Ummm, is this a Caulerpa species? Please see: http://www.wetwebmedia.com/caulerpaalg.htm ... try trotting around the links if not there. Bob Fenner> Thanks Fred

Re: Tumble weed algae Thanks for getting back so fast, I will add more live rock, after checking your link the algae looks most like Caulerpa serrulata, my LFS called it tumble weed, it was not attached to a rock, you could hold a ball of it in your hand, it has a tight curly, dark green appearance to it. <Sounds like it> I did buy your book "The Conscious Marine Aquarist", it is great resource, I used it to set up my system, I came across your web site my accident, glad I did. <Me too> It seems my LFS will answer direct questions if you know what to ask, but really doesn't really promote the hobby or inquire about any problems one may be having. For the most part your on your own, if I hadn't come across your site, I would probably would have lost all my fish by now. <Mmm... what is it about human nature and our interest... the enlightened seem to be able to anticipate what is needed... to make known what needs to be. I am glad we have met> I love the hobby, I thrive on the challenge to keep the fish healthy and happy, this hobby is not for a person who does not want to invest the time to learn about Marine fishes or deal with the costs involved. <You are correct my friend> Thanks for being there for all of us. <Thank you for sharing. Bob Fenner> Fred

Caulerpa identification <<CKB00[1].jpg> a labeled, apparently proprietary image, i.e., not ours to reproduce/use> Greetings, could you possibly identify this particular type of Caulerpa, and its origin? thank you! Blanca&Stace <Mmm, not a Caulerpa species... but a rhodophyte. Please take a read through WetWebMedia.com re Red Algae under the Marine Index. Bob Fenner>  

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