& Algae Mis-ID's on WWM... 8/14/05 Thanks for the comments and advice. I will forward this on to Robert Fenner for a follow up. Sincerely, Mike Kaechele Hello there. I was just surfing around looking for a picture of a particular genus of algae when I found a link to wetwebmedia info page.  First, there is a wealth of great information there... very cool.  However, while scanning the FAQ's on algae identification I was kind of appalled at how many misidentifications there were.  I am by no means an expert on marine macroalgae, but I did eat, sleep, and breathe the subject for 4 years in grad school as well as dabbled in it for 2 years before that in college.  I currently work in the Aquarium dept. at a FL marine park, and every once and awhile I am called on to identify something.  I would like to suggest that if you have a reference section on the site, that you add a few references for id of marine algae and plants.  Specifically, 2 books by Mark and Diane Littler (Offshore Graphics, Inc. : South Pacific Reef Plants, and Caribbean Reef Plants).  Almost any marine plant that could pop up in your tank should be found in one of these 2 books.   (There is no such thing as red Codium, that was a member of the genus Scinaia!)  Just trying to be helpful.  :) Julie Lynnae Liss <Thank you for taking the initiative to write. Specific challenges to identification are well-appreciated... We do cite the Littler's works often... Bob Fenner>

Turtle Weed versus Hair Algae IDs 7/30/05 Is Chlorodesmis fastigiata turtle weed and hair algae the same thing? <Nope... not even close my friend. There are more than a few general of so-called (nuisance) "hair algae". But only one turtle weed I know of: Chlorodesmis> From the pics I could find on the site, my algae is the turtle weed. <Bright green tufts... requiring extremely bright light and high water flow. See algaebase.org for more details versus Derbesia and other types of hair algae> Problem is that lately it has been growing out of control in my 130g tank. <ahhh... no way that its Turtle weed. Chlorodesmis is a slow growing ornamental. "True" hair algae is a fast growing nuisance. Most all aquarists experience the latter at some point in time from nutrients accumulating (weak water change schedule, poor protein skimming, etc.> I had it fallow for 5 weeks due to ick and then introduced my fish...Porc. puffer, 6 yellow tail damsels, Chromis, pink damsel, Foxface, raccoon butterfly, and lawnmower blenny back into the tank slowly over 3-4 weeks in order of aggressive fish last.  After doing this the algae is worse even though it was still present when the tank was fallow. <Indeed... a big influx of nutrients to feed it: fed fish pooping daily> Parameters are 0 except for nitrates which always run 5-15 due to messy puffer. Cant keep any snails other than bumble bee because of BF and puffer. They leave the bumble bees alone but they don't eat the algae. <Ironic, isn't it? :p> I scrape with brush the algae every other week but this is proving exhausting. <Yikes! This IS spreading it! Unless you strap that toothbrush to the end of a siphon tube and suck out the broken fragments as you go along> I get 3-4 cups a week on skimmer and use two powerheads- about 150gph&220gph- a maxi-jet 1200 on skimmer and AC 110 and Penguin 440 powerfilters for water circulation. <Fabulous! Hmmm... have you checked your phosphate and DOC levels (Salifert has a DOC test kit from Champion Light and Supply company for example)> I have read on the site people want to grow this stuff? In my tank it has just gone nuts.  I personally don't hate the way it looks, my husband does, but I have to admit now that it is encroaching on some pretty nice looking purple encrusted. Any other suggestions. Thanks ahead of time. Sherry <Try changing small amounts of carbon weekly instead of larger amounts monthly... use poly filters on your supply/source water (and display) and keep skimming aggressively. It will reduce in months. Maintaining a high and very steady pH at 8.6 knocks it down quickly too and is no harm to fishes or corals if kept steady. Best regards, Anthony>

Re: turtle weed 8/3/05 I replaced my phosphate remover just recently... when I noticed a growth in the hair algae. This is helping and the algae is slowly losing it's ability to stay adhered to rock. So it is slowly receding. You mentioned DOC levels for testing. What is this? <An acronym for Dissolved Organic Carbon> Have not heard of this. I test for the normals... nitrite, nitrate, ammonia, ph, hardness. Also might be a dumb question but are poly filters different from polyester filters? <Yes... Polyester is a base material for mechanical filtration, Polyfilters are a product that incorporates chemical filtration...> I have both but am wondering if these are the same. Also I will do the smaller amount more frequent change of carbon. Also you said that brushing without siphoning will spread the algae. I usually let my filters catch it. So this is not good as well and I should not brush it away? If yes than this is good for me. <Better to vacuum out as much loose algae (and the nutrient that it represents, will recycle), after brushing> What phosphate removers/reducers do you recommend. <Posted on WWM> I have used several types in the past and have found the pads to work pretty well, as well as phos ban, but what do you recommend?  Thanks so much. Sherry <Please include previous correspondence. Bob Fenner>

What algae is it? Greetings crewmembers !  I am trying to identify a particular type of algae. This little pest causes people to fall due to its'  slippery nature and is commonly found in "lawn and garden" centers, growing everywhere, including the damp floor. "Bryopsis" species seems to be the culprit...but I am not positive..? What is it and how does one get rid of it? Any help would be greatly appreciated. <I visit a Marine (boat) dealer and ask about coatings they put on boats to resist algae growth and other critters from attaching.  I believe these coatings have copper sulphate mixed in.  As far as what it is, don't know for sure.  We cater to marine/freshwater aquariums.  James (Salty Dog)>  

Silver bubbles on coral & rock Hi- Recently in my 120 gls salt water reef tank we have noticed small patches of silver like bubbles which are eating away at the coral. Please advise what can be causing this situation and how to correct it. Thank you in advance. Regards, Ceil <Please see here: http://www.wetwebmedia.com/greenalg.htm.  Scroll down to "Valonia"... See the linked files above re Algae Control? Follow them. Bob Fenner>