| Re: Algae on substrate
You say the powerheads are high in the tank.. I would try to get some more flow towards the bottom of the tank and see if that help..
Photo period is total hours all lights are on... mine is 9-10 hours a day... I would reduce the lighting a couple hours a day and see if that helps as well.
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265 Gallon Reef built into basement wall. Lighting = 6x250 watts MH, 2x96 watt PC ,and 2x140 watt VHO for a total watt of 1,972 watts  . New addition on 4-14-07 of 100 gallon sump and 100 gallon refugium. I think I have lost my mind. Gotta love this hobby    Vicki
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