like Harvey stated add a recir line to help with the bubbles.. are you sucking water from the over flow side where the water from the drain goes into the sumo in that case you will build up lots of bubbles alot with dirty water going into the CAL Reactor.
HTH
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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