Quote:
Originally posted by sabbath
I would like to know this one as well. I have read posts in the filtration forums. That you need larger live rock to break down nitrates. That rubble will not do it. You need the low oxygen area that is deeper into the rock.
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This is why you usually add rubble and a deep sand bed in a refugium.
I have also deepened the sand bed in the main tank so as to support some of the life I am creating in the sump. I relied on the life rock taking the hit and it seems to have been ok--no spikes
before:
after 35 lbs of argonite
