| Re: What Am I Doing Wrong? Marble chips for substrate? I would get rid of the marbles and use sand. Do you have any live rock? Your filtration for the tank seems off. The bio balls and anything in the filter (like sponges) make tons of nitrates for the tank.
What I would do is replace the substrate with sand, get rid of the filter and get ALOT of live rock, add a refugium with macro algae and make sure the skimmer is skimming good. Keep the Uv sterilizer. Good luck
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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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