With everything I have heard, and by all means this is just speculation, but is it possible that with your new flow, that there isn't a proper exchange of water from the bottom of the tank to the sump? I know you have MP40s now, and they are great but you still need some movement up and down, I do this by directing the returns downward... food for thought.... couldn be why some corals are reacting harshly because they arent getting the oxygen provided by the sump? Feel free to give me a call Marko if you run into more issues....
Steve
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