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Old 08-29-2003, 03:20 PM   #1
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Major Algae Outbreak - Help!

I was given a 90 gallon salt water reef system around the beginning of March. It had belonged to a friend of mine and he had gotten tired of it so there wasn't much living in it when he gave it to me. I cycled it for 3 -4 four months then when it seemed that the nitrates were near zero, I decided to try adding some fish. I chose Tangs because I thought they could help with an algae problem. Unfortunately, the Tangs that I added must have had Ick becuase they caused almost all of the fish in my aquarium to develop white spots. Three ended up dying, before I could set up a qt tank. Two of the three were not removed after they died. This, of course, was great fertilizer and I now have a very large algae problem. I have been reading everything I can find to address the problem and I wanted to get some feedback from some folks to be sure I am taking the most logical steps. The problem is definitely improving as my nitrate level is now back to close to zero, but there is still a coating of algae on all my live rock.

I have done the following: 1) Used a phosphate sponge to try and remove excess phosphates (I don't have a phosphate analysis kit yet), 2) Used Kalwasser because I read it will help precipitate excess phosphate - obviously this will help raise calcium levels as well 3) dramatically improved the amount of water movement by adding two 300 gph pumps. This I read should help keep the CO2 levels low as well as help with waste removal. 4) Cut way back on the hours of my MH lighting. I think I have gone from about 13 hours to around 6 hours. I don't have any coral right now so doing this isn't a problem. 5) I have pulled out the large clumps of algae simply with my hands. I haven't tried using a brush.

I am planning on purchasing some algae eaters this weekend such as snails, sally lightfoot crabs, and hermit crabs. I only have a couple of snails and a couple small hermit crabs right now.

Are there other things I should consider trying to slow the growth of the algae and getting it under control?

Thanks in advance for any help anyone can give.

awillemd1 is offline   Reply With Quote
Old 08-29-2003, 03:40 PM   #2
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add macroalgae

dogofwar is offline   Reply With Quote
Old 08-29-2003, 04:49 PM   #3
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What color is the algea? Brown, Green, Red? I think besides getting the algae eaters, doing your water changes with RO/DI can help keep it under control. What are you using for your water changes and top offs now?
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Old 08-29-2003, 05:17 PM   #4
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Thank you both.

The algae is mostly green and stringy. However, I have seen some brown stuff mixed in and some light dusting of brown on my aquarium glass. I have read that this could be diatoms.

I us RO water from my home RO system for top offs and water changes. I recently changed out the filter, but this was after using it when it was not operating properly for a while, so I probably accumulated some phosphates in the aquarium (this is a guess).

Regarding the macroalgae suggestion, I think this is the obvious goal since algae won't grown on rock coated with macroalgae, but don't I need to get the algae off the rocks for the macroalgae to grow?
awillemd1 is offline   Reply With Quote

algae, outbreak

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