There's very little science behind any of these claims. It usually come down to whatever a particular individual thinks is 'right'. In my view, turnover between the sump and tank must accomplish two things: ensure even heating (easy to verify) and effect proper surface skimming (not as easy to verify). I accomplish both by running about 3X. Everything else is immaterial.
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Simon
Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones!
Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs
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