Ken Posted January 9, 2022 Share Posted January 9, 2022 My last two HOBs are on a 40B and 20L (36" and 30" long). I'd like to be rid of the HOBs all together. I'm thinking of putting the new CoOp powerheads on the sponge filters, if you have one the new powerheads what is your opinion? Will the flow be overwhelming? Both tanks have some plants and hard scape to break up the flow a little. No big flowing finned fish but my Lemon Tetras seem to avoid being in the output of the HOB. 1 Link to comment Share on other sites More sharing options...
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