Koralias don't belong in a 90, IMO. I had one in mine for a couple of weeks, sold it at less than half what I paid.
I currently run two Tunze 6060s, and that still, again IMO, is not enough. This is with 600gph from the return.
I have a few LPS and they barely move in the tank, so for sure this isn't enough for my SPS. And I only have frags now. Once they grow up, I'll have to upgrade the flow.
Go to a LFS that has some of these Korallias running and put your hand a foot in front of it....nothing!
I know they're appealing from a cost standpoint, but you'll regret it down the road. As with everything else in this hobby, spend the right money upfront, then you don't have to respend it in 6 months (or two weeks in my case)
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Brad
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