KaceyJ Posted February 28, 2009 Share Posted February 28, 2009 I just set up my 125gl, but I am not sure how to get the syphon started. I mean the return pump pushes all the water out of the return section of the sump, but the tank is almost full and the return part of the sump empties, I am reluctant to put more water, because the overflow box does not seem to be pulling water. I do not know what i am doing wrong. Link to comment Share on other sites More sharing options...
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