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Sorry I have not read all of this thread, but has anyone buried some organic matter (preferably low in p04) down deep in the sand? If I understand it right it is the reduction of dissolved organic matter, without oxygen that causes the reduction of nitrates. So in tanks with low DOM (heavy skimming) this process would take longer. It also occurred to me that the RDSB would aslo make a great cheto fuge by adding a cheap flood light. The cheto would take up P04 and provide oxygen. However once the nitrates got down to "0" it would not grow so well. Then nitrates would have to be added (magine that!) to provide the P04 uptake. But then this wouldn't be so novel. Would it? I do beleve that Randy Holmes-Farley utilizes this strategy. But anyway how about burying some shrimp down deep?
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