Gideyon Posted December 27, 2021 Share Posted December 27, 2021 (edited) I've been doing an experiment with anoxic filtration utilizing a penplax undergravel filter. I have the UGF on the glass, then a fine mesh nylon fabric on top of that, then a baked clay, then gravel. Something strange happened here and I can't figure out what. It looks like the fabric lifted, exposing the plate. Some of the clay mush started falling in too. I have no living things in this tank other than bacteria. The uplift tube is on the other end of this 10 gallon. Could air from the airstone somehow gotten trapped under the UGF, and exploded out the far end? Edited December 27, 2021 by Gideyon Link to comment Share on other sites More sharing options...
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