why am i getting a gurgling sound from my sump?
i topped up my sump to the max line, and since i've been getting some gurgling sound every few minutes. as the water level has dropped in the sump the sound is not as often but it's still there.
any ideas? suggestions to correct?
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tanks:
120g w/starphire front, pm bullet 2 skimmer, yellow tang, emperor angel, niger trigger, spotted hawkfish, blue tang, flame angel and 120lbs lr
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