ya I had the same problem lots of little critters are getting caught in them like the baby brittle stars i have millions of them in the tank. they do work well catching the crap in the over flow. but really if you are cleaning your sump on a regular period then you dont need them..
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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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