So I'm going to replace the foam in my Aquaclear 50 HOB. Do I need the bag of carbon that came with it, or would I be better off with another foam or more biomedia? Thanks for the advice.
Also foam will function as biomedia, provided it stays in there long enough. Some biomedia might be beneficial to sustain a good bacteriaxulture in your filter.
The filter came with a foam block, a carbon bag, and a bag of biomedia. So it sounds like the preference here would be to replace the carbon with another sponge instead of adding more of the bio pellets. Is this correct?
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