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Old 09-09-2005, 07:33 PM   #1
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Brown Algae on Sand -- Killin' Me -- OUCH

Hi All

I've got a brown algae problem after being away from my aquarium on business for 2 months.

Within hours, a thin hairy layer of brown algae grows quite rapidly on my aragonite sand.

I have tried good waterflow, charcoal, and phospate sponges in the filter along with rigorous protein skimming with no improvement. The water temperature is maintained at 79 degrees via an Aqua Logic chiller.

Parameters: 110 gallon glass (tall) // 30 gallon sump // CPR overflow and pump at 1100+ gph // 2 powerheads at 100 gph // RO/DI water added daily // lighting: 500 watts of MH, 300 watts of VHO in various spectrums for corals/rock

I am going to add an ozonizer to the skimmer intake in a few weeks.

I would say that I need a bigger cleanup crew and am adding snails and hermits and emeralds weekly.

What am I missing that is so hard to keep this under control? Does anyone have any more advice to give to a pretty hardworking learning reef keeper....I've given advice on this myself before and now I'm stuck....Please help!

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Old 09-10-2005, 12:01 AM   #2
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Brown diatoms- usually caused by excessive silicates or PO4's. Feed "cautiously", keep up w/ weekly PWC's, and use GAC. Have you checked your RO/DI unit lately? It may be time for a RO and/or DI replacement. HTH
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Old 09-10-2005, 12:28 AM   #3
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phosphate/silicate remover if your on tap water could help
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Old 09-10-2005, 03:46 PM   #4
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Okay, thank you. What is GAC? Is a PWC a pure water change?

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Old 09-10-2005, 04:40 PM   #5
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GAC is carbon...
PWC partial water change...
Test you water for nitrates, phosphates and silacates and post the readings. It is feeding off excess nutrients from some where. Check your top off water also.
Who was watching the tank while you were gone?
Maybe they were over feeding the little begger fish.?
Were any water changes done while you were gone?
Do like the others say, water changes and test water..
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