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by Jon_D » Tue Oct 15, 2019 12:42 pm
Yep, they are to increase suface area for bacteria, but these are too big to go into my filters; 1 inch diameter each. Not a lot on YouTube for these particular ones either.
Last edited by
Jon_D on Tue Oct 15, 2019 12:45 pm, edited 1 time in total.
The voices in my head may not be real, but they have some great ideas!