DJ ArKaDaRkA
Fishaholic
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do i need this in my internal juwel filter ive seen a few posts saying you dont need it
is it doing any good or harm?
is it doing any good or harm?
You dont need the black carbon sponge, its pretty useless after a few days anyway, you only need to run carbon in the filter to remove medication (if you have to some). Use another blue sponge instead.
i wouldn,t use it may leak chemicals into your water

if its a juwel tank they have a red waterline near the filter you shouldnt fill it higher than the red line
If its foam and not sponge, it will eventually rot, I would remove it to be on the safe side. You can get cheap sponges from most LFS, it doesnt have to be a juwel one.
If you dont have a red line, just fill it as you have been, just above the glass so you cant see the water line.