Hi, these things keep popping up around my tank! I have tried physically removing them, but they just keep coming back! My water checks out fine all across the board! I have a 29gal with a sump, in the sump I have asSkimmer, heater, and Bio balls. All in separate compartments. I have a aqua life light with 4 HO T5 bulbs and 4 sets of 2 luners. Any advice would be greatly appreciated! Thanks!
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