lee Posted December 13, 2020 Share Posted December 13, 2020 (edited) Hello all, I would like to switch my current HIB filter to a sponge filter. The sound of the trickling water is annoying me... but I also do not want to hear the hum of the air pump. Does anyone know if I could use the USB Nano air pump with a medium size sponge filter in a 20 gallon? Would that be appropriate or do I need a more powerful air pump? Thank you- lee Edited December 13, 2020 by lee added a word Link to comment Share on other sites More sharing options...
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