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Old 03-17-2005, 05:44 AM   #1
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Coraline algae bleaching

My coralline algae had been growing like crazy over my LR and glass for many months. But recently had started to recede and turning to a green and whitish color. I haven't made any changes to the water chemistry apart from the regular dosing of calcium and dKH. So what could be wrong?

My water parameters are Ca=450, dKH=11, PO4~0, PH=8.2, NO2=0, NO3=25. I know my nitrate is a bit high, but it has always been about 25 when my coralline algae are growing fine. I have 160W of PC lighting. I have not changed salt and is still the same batch of salt for the past few months.
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Old 03-17-2005, 10:58 AM   #2
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I often have the same thing happen to me. It comes and goes in waves it seems. It will bleach, grow back, bleach, grow back. In the meantime my glass and powerheads get totally covered in the stuff with no aparent bleaching going on there.

However, Since I started dosing with calcium it has happened less frequently. perhaps its just a coincidence.

I have no solution, so I am going to hop on this thread with you and wait for an answer. :P
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Old 03-17-2005, 01:50 PM   #3
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Interesting... So that means that it could be a toxic substance released by a coral in certain periods? Do you guys have a common coral?
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Old 03-17-2005, 09:16 PM   #4
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Have you upgraded or changed you lights recently?
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Old 03-18-2005, 04:26 PM   #5
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What Acraman asked??
There are other color variations of coralin IMO I have greens, pinks, purples.
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Old 03-18-2005, 04:47 PM   #6
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I haven't upgraded any lights. and its not a different coraline color. its acually turning white. as if its dead. several weeks later, it comes back.
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Software:2 Tank-Raised Ocellaris Clowns, 1 Purple Firefish, 1 Electric Orange hermit crab, 18 Blue Legged hermit crabs, 8 or so Nassarius snails, Xenia, Blue, green, and Green Striped Mushrooms.

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Old 03-18-2005, 05:03 PM   #7
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Strange?
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Old 03-18-2005, 06:52 PM   #8
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Like RocketSeason, I have not upgraded my lights. My coraline is purple red and then turned white. But so far I haven't notice them changing back.
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Old 03-18-2005, 07:26 PM   #9
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try calcium dosing. It hellps for me.
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Software:2 Tank-Raised Ocellaris Clowns, 1 Purple Firefish, 1 Electric Orange hermit crab, 18 Blue Legged hermit crabs, 8 or so Nassarius snails, Xenia, Blue, green, and Green Striped Mushrooms.

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Old 03-20-2005, 02:41 AM   #10
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My coraline does this as well. I control Ca/Alk using Kalk. So it seems to grow/recede in certain areas, it always seems to be doing well enough that I don't worry too much about it.
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