the thing is to get as much flow as you can in a SPS tank, I was sitting at 10X (minimum good rate for any tank) and then jumped to 45X (max my sand bed would allow) now that my sand bed is gone I am at close to 100X turn over (97.7X to be exact). I have noticed much better growth and shape of the corals.
the trick is to be able to do this with out that much flowing through my sump as that would be a 300+X turn over rate there and I don't think my baffles would allow that
so my sump only has 2400 GPH flowing through it.
Oh, you also want to spread that rate evenly though out the whole tank, not just in the top 1/2 or it will seam like a mix master. with my turnover you can put your hand anywhere in the tank and all you feel is a gentle current, and no blasting
Steve
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