Jason A. Posted November 30, 2021 Share Posted November 30, 2021 So I was wondering if anyone has taken small bio balls or bio rings and put them in the sponge filter uplift tube? Thinking if it doesn't slow down flow to much it would be similar to the twin sponge filters that have container for the bio media just thinking of ways to improve what we already have not reinventing the wheel Link to comment Share on other sites More sharing options...
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