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Export suggestions. Actually: Sources of Ca reactor media
Calcite test... for Ca reactor f'/FB calcium reactor question; media
issue 8/17/11 Low Alkalinity even with a CR, Calcium Reactor
11/12/10 Knop C Calcium Reactor, Mg source --
08/23/09 Re: Calcium Reactor (Selection) -- 08/17/09 Calcium reactor media. Aragonite/Calcium carbonate confusion 5/2/07 Hi crew, I do know that calcium carbonate is used as the media for calcium reactors. The questions is can aragonite be used in calcium reactors and is the procedure and benefits the same as using calcium carbonate? <Aragonite is calcium carbonate. It is one of the minerals with the chemical compound CaCO3. Due to its crystal lattice its solubility is a little higher than the solubility of the other common calcium carbonate mineral calcite. Therefore, aragonite is used in calcium reactors.> Thanks, Mohamed. <Cheers, Marco.> Calcium Reactor/Media 2/23/06 Bob, <James with you today.> what is the best calcium reactor media to used and were can I find it. I hope you are well. <Ralph, I've always thought Knop Korallith Media was one of the best products in this regard. Can be ordered from www.drsfostersmith.com. James (Salty Dog)> Ralph Gibson Makeup Water & Calcium Reactor Media using Magnum HOT 250 3/3/06 Bob & Colleagues, Ditto on the kudos to the great web site and fantastic reference books. <Ditto welcome> I have an eight month old 120 gal reef aquarium with a 20 gal refugium. I have been using SeaChem products <Good products, company, folks> to maintain proper calcium and carbonate alkalinity levels. My system loses approximately one gallon of water to evaporation per day. I use RO/DI water for this makeup water. After aeration, the RO/DI water has a pH of 7.0. <Yep> Eventually I plan on adding a calcium reactor to my system. However, in the interim, I am considering an experiment. I plan on using a seven gallon bucket for makeup water preparation. I plan on running (24/7) a Marineland Magnum 250 H.O.T. filter filled with CaribSea A.R.M. Aragonite Reactor Media for the makeup water preparation. On a daily basis I would transfer one gallon to my system and replace it with one gallon of raw RO/DI water. I hope that this will reduce the SeaChem supplements that I need to use without any significant risk to the chemistry of my system. <Should> Since I already own the Magnum filter, there will be virtually no expense in this experiment. Would you please share any thoughts that you might have on my planned experiment with me? Could there be a negative impact? Thank you for your time, J.B. White Austin, TX <I think this is an excellent idea... worth the time/trial. I would further encourage you to try other media with testing. Bob Fenner> Toxic tank, Contaminated Calcium Reactor Media 2/12/07 I have had toxic tank syndrome for 8 months now. My pulsing Xenia starts to turn black in less than 24 hours. All SPS corals had to be removed from my 180 gallon 5 year old tank. Lost some fish, scooter blenny, mandarin, Rainford goby. <Yikes... so, what have you done re the toxicity?> To make a long story short, I changed water like crazy, searched everything for a metal contamination. Could find nothing, so I emptied the system completely. Cleaned it all out, replaced the sand bed, all rock, everything out, and refilled with natural sea water. After a week, I put a piece of pulsing Xenia in last night, and this morning the polyps were starting to turn black. I got mad, again, and the only thing I had not done was to empty my calcium reactor. I put the media in a bowl and searched it. Using a magnet, I found small flakes of metal of some sort, laced through the media!!!!!!!!! <Yikes...> I have not idea how it got there! Not from me! I won't mention a brand name here. <I wish you would... My wife, Diana, used to distribute Knop Products in N. America... their Korallith was/is very pure...> I will do a 100% water change as soon as possible. I can not afford to change the rock and sand bed again! What further steps should I take? Carbon? Poly filters? <Yes to both of these... this should do it> Will my new rock and sand be ok? <Very likely yes> There are no fish or corals in the tank st this time. All have been moved to other systems. Help Richard <Thank you for relating your experiences... Will save many others huge headaches and grief. Bob Fenner> - Ca & Alk, Calcium Reactor - Hello again and thanks for all the past help. My system has been running at pH 8.2, Ca 320ppm and Alk 10-11dKH since installing calcium reactor three months ago. I have tried to increase Ca by increasing bubble count to 120/min (started at 60) while keeping flow constant at manufacture's recommended starting point of 2-3l/hr. Effluent is close to ph 6.5 and 40 dKH. Trend seems to be that as I increase bubble count, alk increases but not Ca. I understand that Ca is necessarily lower when alk is high. Is this just a function of reactor media (ARM) and will I have to supplement Ca or will I eventually be able to dial in Ca to 350-400ppm with the right combination of CO2 and flow. <Well, two things come to mind - first, the ARM media is notoriously impure, which means you really can't rely on it for consistent results. Second, calcium reactors are 'really' alkalinity reactors, and by boosting alkalinity promote better availability of calcium - of course it helps that the effluent is calcium carbonate, but really, I don't see anything wrong with those numbers. Do also use the growth of your calcium consuming organisms as a guide.> Perhaps I need different media (suggestions?), <Knop Korallith.> or is 320ppm & 11dKH just fine and I should leave it alone? <Yes to that as well.> A. yongei frag is doing well so far but want to get everything right before starting to stock in earnest. Regards, George. <Cheers, J -- > - Which CO2 to Use - Sorry to bother you again. <No worries.> I contacted a firm on the purity of the CO2, and they say they can provide any level/grade. Medical grade is 99.9% pure but is really expensive. Is there a middle of the road or is the 99.9% the way to go?? <As pure as possible is really what is necessary - but still, you're paying for the guarantee... much of the CO2 dispensed is 99.9% pure.> Also, I am having a problem trying to regulate my bubbles and maintain same. I did have water back-up to my regulator before but have added check to prevent reoccurrence. <Seems very odd - again, am pretty sure there is a check valve built into the S-IV reactor.> Could regulator be damaged?? <Quite possibly if saltwater was what got into the regulator.> If I were to replace regulator, what would you suggest?? <No suggestion - these regulators are for the most part all created equal.> THANKS <Cheers, J -- > - Calcium Reactor Media - Dear WWM Crew, What is the difference of fine to coarse calcium reactor media? <Just the grain size.> I purchased the course Korallith (6-10 mm). I was a little surprised at the size of the pieces. Should I have purchased finer media? <Yes. The large media is really for the extra-large reactors.> The online store indicated that the fine or the course would work. <I think you have super-coarse - there are three grades, you have the largest. You need the medium sized one - pieces between one and two millimeters.> Thanks for help, Brian <Cheers, J -- > - Alternate Bottled CO2 Source for Calcium Reactor - Hi Bob, I started with your book as a guide quite some time ago. I have a 90 gal. Reef and I am going to install a Knop C reactor. My question is, Can you use a paintball 5 lbs C02 bottle are they adaptable or must you use the standard one sold by aquarium stores? <Not certain, but do think finding a regulator for the paint gun bottles - in this country - are remote at best. Have seen same at trade show in Germany - small CO2 bottles with sized chrome covers very popular in the planted tank arena, but are not as far as I know being imported by anyone yet - so same would go for the regulator. Most CO2 regulators that I've seen in the states are made to fit the larger tanks, similar to the ones at the store. You can also get the tank directly from a local gas supplier - might not be polished and pretty, but functional.> Far be it from me to like the norm... hahaha <If you can find a regulator, you can use the bottle. Not sure how long they would last.> Thanks, Fred <Cheers, J -- > Calcium Reactor Media Hi: I recently switched to Korallith
reactor media, but have found that it is hard to dissolve and my
calcium reactor now can't keep up with the demand, even with a high
CO2 rate. <<Which size media did you use?>> (I've got
heavy calcium users.) Lately I've been adding Kalkwasser around the
clock for top off and I still can't get Ca levels above 380 ppm. kH
is stuck around 10.5-11.0, but I can/have supplemented with Kent
ProBuffer to get it up around 12 even 13, it just won't stay there
unless I keep supplementing. I'm not sure what media I was using
before, because I bought the reactor used and the old media worked
great. It looked like it had crushed sea shells in it, but I hear
that's not a well-balanced media like aragonite. <<I've
not heard that, and would certainly endorse using self-made crushed
coral, shells, and the like - I mean... what are these things made out
of anyway?>> From reading and looking around, I think what
I'm after is CaribSea ARM because it sounds like it dissolves more
easily plus has a good chemical analysis. <<Personally, I
don't buy into all the recent hype about reactor media.>>
What media do you recommend that dissolves the most easily? <<I
use Korallith and have had no problems.>> I perform 10-15% water
changes every week or two. <<I would just add that I also
don't subscribe to the philosophy of keeping calcium and alkalinity
levels unusually high. The numbers you list are more than adequate, and
are perhaps even higher than the normal, average conditions found in
the ocean. I wouldn't strive for extra high numbers as they are
really just unrealistic and itching for a problem like calcium
precipitation. Cheers, J -- >> Calcium reactor questions... effluent properties Hello <<Greetings, JasonC here at your service.>> I was wondering what is the best ph to run my calcium reactor with Korallith media. <<Ideally, you would want the effluent pH to be roughly 6.8, not any lower than 6.5... you should also measure the dKH of the effluent and try to tune the reactor to get that to about 15-16.>> Thanks . Bill Wann <<Cheers, J -- >> - Calcium Reactor Questions - <Greetings, JasonC here...> Good evening crew, i have been looking through the site with regard to Knop reactors, i have a model c and i think it is a very good piece of kit and reasonably priced, my only minor problem is that i have been using the CaribSea arm media for the past 12 months or so, and i have not been very impressed at all with the performance, so i have just changed to the Korallith, the only bugbear is that i am trying like mad to get the reactor effluent down to ph6.5 as instructed and I'm having no joy at all, i am putting 18 bubbles per minute through with co2 and my effluent rate is 35 drops per minute, the best i can get down to is about 6.85-6.95 and i test with a hand held Hanna ph meter, can i put more co2 through or will this give me a co2 lock in the chamber, also do you guys think that its best to get the ph down or just align the dKH on the effluent side and let the ph fall wherever (i.e 3-4 times tank dKH). <Actually, a pH of 6.8 on the effluent side is sufficient. If you want to lower that a little more, you could just slow down the effluent drip rate... cause the water in the reactor to stay in there a little longer.> Many thanks your comments greatly appreciated as always. Paul, Manchester <Cheers, J -- > - Calcium Reactor Questions - <Greetings, JasonC here...> Hello again oh wise ones. <Oh stop it, I'm a long way from wise ;-) > I have the 180 gallon acrylic with a 60 gallon acrylic tank that I have running under the tank with frags and a few fish. I have had a Knop C calcium reactor running down next to the 60 gallon for the last year but lately the effluent alk is down to 19 which isn't keeping my tank effluent up above 4. When I started using the reactor the effluent was up around 35-40 which was keeping the tank alk around 10-11. My calcium is between 345-390 with the addition of the Kalkwasser slurry on a nightly basis to keep the pH up between 8.1 and 8.35. I use the test kit that turns from blue to green to yellow. I'm not sure which test kit it is. My CO2 bubble counter is set at 4-5 bubbles per 15 seconds. The effluent drip is running at about 1-2 drops per second. I am using Carib sea media in the reactor. What would you recommend that I do to get the effluent up to par so as to keep my main tank alk up above the 6-7 that would be the low end that it should be? <Two things, I would can the Carib Sea reactor media - the quality is too inconsistent - and switch to the Knop Korallith which is the only media that Knop guarantees will work with their reactors. Likewise, it sounds like you are expending your media rather quickly - it's probably time to swap it out.> I have had to add Seachem Reef Builder lately to get the alk up a bit to 6-7. Any help would be greatly appreciated. Thanks again, Jeff <Cheers, J -- > Reactor Media - 2/13/03 Dear Anthony, thanks for that link, I've had a look and they look like they could really do the job, and they're reasonably priced, <excellent!> I was wondering if you might be able to shed some light on my small dilemma with my reactor, I have a Knop model c (good piece of reasonably priced kit, we can pick them up over here for £100.00 without gas and gauge), <agreed... I like them very much> anyway the thing is i have always used the CaribSea arm media in the past but my L.F.S have run out and i have changed to the Korallith, <a much better move in my opinion. I'm not a big fan at all of CaribSea media> the only problem is trying to get the reactor ph to 6.5. At the moment its running at about 6.15 I've just bought myself a hand held ph meter to try and test accurately, my co2 bubble count is 14 and i have been dosing on 60 drops per minute, but at this setting my dKH is coming out at 27 degrees (German) and i know it should be around 35 degrees, i have been playing around with it (i.e. decreasing the number of drips down to 50 to see if this would raise ph, but it wont budge above 6.20), when i was using CaribSea i just used to set the reactor to dKH 35 and leave it, any ideas? <absolutely... my first (and confident) guess is that the media is too large. Knop has more than a few grain sizes. I'm guessing you need a smaller grain for your sized reactor. By chance does this seem possible? Is the Korallith coarser than the ARM you were using? Should i try and set the ph at 6.5 or go for the dKH at 35. <if the previous settings ran well, I'd like to see you continue with it> I must admit this is driving me nuts at the moment, everything in the tank is great but you know how it is we reefers are perfectionists (ha! ha!). <no worries... I suspect this will be easy to tweak> All the best Paul (P.S. went for a great Indian meal last night, chili chicken and pilaf rice, absolutely superb but my god, i had a very bad case of Gandhi's revenge this morning) <Ha! What's especially funny is that here in America we call it Montezuma's revenge. Yours is funnier for the British-Indian history, though <G>. I do hope that you had a seat belt in the lav to keep you secure during the endeavor!> Calcium reactor Bob: <Steven Pro this morning.>
Recently I set up a large calcium reactor on my relatively small 60
gal. reef tank. After running the reactor initially (day and night),
the tank "crashed" and most of the inverts such as snails,
starfish, shrimp, etc., died. <Sorry to hear it. Have you identified
the reason behind the crash?> The die off caused an obvious water
problem with the level of organic material from the decaying animals.
Subsequently, an algae, or what I thought was an algae bloom occurred.
I am more apt to say that the reddish brown, small stringy (1-2 mm
long) material (that has coated the live rock and corals) are
dinoflagellates, although I have never had an outbreak before. I
scrubbed some of the rock, and although some came off, it left the rock
a rusty color. The corals in the tank survived the alleged pH crash
from the reactor set-up (although this "crash" is unconfirmed
since I electronically monitor the pH), <I do not understand this
statement. If you monitor the pH electronically, then you should be
able to confirm the pH drop which caused the tank crash.> but none
of them look very good since I added the reactor and this bloom
occurred. My pH normally is between 7.9 (night) and 8.1. I am working
to increase it. <Work harder. A pH below 8.2 is unacceptable for
corals and is a sign of poor husbandry practices.> Of course, I have
shut off the reactor until I can resolve this problem. <Always best
to have all of your water parameters in line before starting a reactor
and then monitor very closely for the first few weeks.> 1-2 weeks
after this bloom, I started the reactor again (slowly and while
monitoring the tank closely). I then did a 25% water change in the
tank. The next day after the water change, the bloom came back even
stronger (I measured phosphates at 0 in the R/O water used). At the
same time I kept the reactor running 24 hours. Could this bloom be
caused (or supported) by the reactor material I am using. <Possibly
by contaminants in the media and by excess CO2 in water.> I am using
Carib Sea aragonite in the reactor, and not the more expensive reactor
material. Could some leachates in this material cause or support this
bloom? <Possibly> My protein skimmer is skimming like crazy a
very dark skimmate even after the 25% water change. It is strange but
somehow I feel this may be related to the aragonite used in the
reactor, based on how the bloom came back even stronger after the water
change, but while the reactor was still running. Could this substrate
have leached toxic substances that could have killed the inverts, or is
this reaching? <Sounds like reaching to me.> The phosphate levels
in the tank measure 0 from the most recent test. <Test kits only
measure inorganic phosphate, not organic phosphate, so there could be
phosphate that is undetected by your kit.> Tim <I would turn off
the reactor for now. Get everything squared away and then reattempt its
use. -Steven Pro> DSB and reactor media Hi, Mr. Calfo, Here I am again. The following questions is bothering me a lot. <No worries, my friend...> 1. Why is it a bad idea to mix some larger coarser grade sand into a 6+ inches DSB? <Various grains of sand permit or deny diffusive action (osmosis, saturation or diffusion, etc). So a bed of coarse sand only will allow better penetration of oxygen rich water (which you do not want for efficient denitrification) by virtue of the large angular shapes of the sand media and the larger spaces between grains. It also traps more detritus but does encourage more amphipods. Fine sand, on the contrary encourages more microfauna (bacteria, tiny worms, copepods) and is better suited for the establishment of a larger colony (because of the increased surface area of the smaller grain sized) of denitrifying bacteria. When all is said and done... we don't need course sand for amphipods because they will grow anywhere else easily (live rock, sump, refugium) and the trapping of detritus can be a nightmare to keep up with and in the typically poor current displays of so many aquarists leads to the crash of a sand bed unfairly blamed on DSB methodology. You want sugar fine sand if you are gunning for denitrification and it really needs to be as deep as possible (solid 3" minimum but over 5" is much better)> 2. I just bought some calcium reactor media by Dupla. The media looks like some crushed coral and shells, and I am sure they are. I have also checked out the calcium reactor media by CaribSea, and it too looks like crushed coral, but it is claimed to be aragonite. Why??? <Not all shell/calcareous media is aragonite. About 20% of the beaches in the Caribbean are said to be composed of aragonite... the rest are calcite. Just a different form of calcium carbonate but a big difference nonetheless. I have seen some studies about reactor media... not the least of which are reports from the notable aquarist/author/manufacturer Daniel Knop. Avoid shell and crushed coral at all costs. They are least effective and most likely to impart undesirable elements. Champion Lighting and Supply have an excellent bulk calcium reactor media that is outstanding. Do look into it. Let them know I suggested it if you like.> 3. Since aragonite and crushed coral look so much alike, how can we tell one from the other by their appearances? Is aragonite crushed SPS coral? <We aquarists cannot tell visually. It is a molecular difference. The notable advantage is that it dissolves easily and at a higher pH. Calcite is tough to dissolve. We must trust the word and reputation of the vendor along with the experience of fellow aquarists. Many of my friends swear by the bulk media at Champion.> Sorry to bother you. Thank you for your time. <No bother my friend, always a pleasure.> Sincerely Samuel Calcium Reactor Media hi bob, <Howdy> hope you're doing well. all is fine in my set-up, though started wondering abt. my calc reactor, recently -- I have an Aquamedic calc reactor (large, for up to 250 gallon tanks), still using the original media it came with. I've been using it for abt. 7 months. when do you think is the best time to replace the media? abt. 6 mo.? is Korallith a brand you'd recommend? thanks! <Mmm, I wouldn't "just" change out the media on a timely basis... that is, just for the sake of it... I trust you're testing for calcium and alkalinity. I would switch or augment the media when these become limited. Brands, products do vary quite a bit. I encourage you to check with actual end-users, like through chatforums (ours: http://wetwebfotos.com/talk/) and experiment with a few yourself to see what gets you where you want to go with the least cost, most ease. Bob Fenner, whose wife does distribute Knop Products in N. America., just a timely admission> - Javier Media for my Calcium reactor I am getting ready to start my
Calcium reactor. Please tell me what you feel, or if there have been
any studies, what is the best media for my Calcium reactor. Also, I
can't seen to do a search on WETWEB any more please help:) Thanks,
Brad:) <Many routes to go here with the media question... not just
"pure" or easy to dissolve "Aragonitic"
materials... You want, need other alkaline earth compounds... I suggest
a bit of experimenting with some "standard products" like
CaribSea's fine offerings... Try "a bag" of various
size/grades of their types and tell me (please) what calcium,
strontium, magnesium, alkalinity, pH values you come up with in your
particular circumstances (type of reactor, pH of effluent, time in use,
amount of reactant...). Please do record your findings in a bound,
permanent notebook, in ink. On the "search question", I am
sending your msg. to Mike.K my cohort on functionality and looks for
WWM (it's only us two...). Miguel, what say you? Bob Fenner, who
maybe should private label...> |
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