Rory the reason i am knocking out the pump its a flow pump so you not going to get the bubbles like a pressure pump.
the second it the sump is a 25 gal i think and the return is a mag18 so in Mine experience i would say it's the water is going thur the sump too fast.
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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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