1) is there an air hole in the diy noise maker? if not that could be the problem, if there is, should be about 3/16-1/4"
2) the cover on the overflow, is it restricting air flow, if there is a hole in the diy noise maker?
3) in the sump, why is the drain from the main tank under water? this may be your problem.
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just one little sps frag tank with lots of goodies |