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Old 02-03-2015, 03:59 PM   #1
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Diatom Algae?

I am constantly dealing with this redish brown algea on the rocks and sides of my tank. I have tried cutting way back on the light in my tank, but it seems to have almost no affect at all. Any suggestions on how to deal with this problem?

75G Tank
6 electric yellow cichlids, 3 venustus cichlid, 2 synodontis multi catfish
Aquatop cf500uv Filter (525GPH)
Weekly 40-50% WCs
Water buffered with seachem malawi/victoria buffer cichlid salt
Tahitian Moon Sand substrate, with granite rock piles as hardscaping (no effect on hardness or pH)
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Old 02-03-2015, 04:19 PM   #2
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How new is the tank?


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Old 02-03-2015, 04:22 PM   #3
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The tank is about 2 months old, but I was experiencing the same issue in a 55g I had before I upgraded, and that tank for over a year old. I actually was hoping that the extra water from the 75g would help my cause.
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Old 02-03-2015, 04:29 PM   #4
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Diatoms typically go away with time, just make sure to not over feed and keep the lighting less than 8 hours


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Old 02-03-2015, 04:33 PM   #5
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Freakgecko91, thanks for your help I will just give it some time and hope it clears on its own.
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Old 02-03-2015, 04:49 PM   #6
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No problem, I had a horrible outbreak in a tank recently and scraped it off the walls, and within the next few weeks, I have basically no diatoms.


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Old 02-03-2015, 05:23 PM   #7
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Your filtration seems to be on the small for a 75g. Although it was probably ok for your 55g, you should be cycling water at about 750 gph minimum.


Have you measured your nitrates right before you do your water change? They may be high and will make your algae problem worse.
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Old 02-03-2015, 05:38 PM   #8
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Just keep on the water changes and it should go away. Nerite snails also work well for controlling diatoms.


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