Thread: Nitrate issues
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Old 01/08/2008, 10:43 AM   #11
garygb
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Join Date: Aug 2004
Location: los angeles
Posts: 4,471
Is your 6 inch sand bed in the refugium oolitic aragonite sand? Could detritus have built up there? Sometimes DSB's need to have the top inch or so siphoned. Does the sand in the display tank need to be siphoned? From what I've read, 1.5 inches might be trapping a lot of detritus, so I would siphon it. Have you considered a RDSB as discussed in a thread on RC? Do you have water flow sufficient to turn over the water volume at least 15 times per hour? How are your animals looking? Have you tested the nitrates with more than one test kit?


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