For the pair of shrimp tanks I'm starting up, I'm trying out the aquatop IFS10 filters. They're like a canister filter that sits in the tank. ( http://www.amazon.com/gp/product/B006FL9APO/ref=oh_aui_detailpage_o08_s01?ie=UTF8&psc=1 ) The little boxes that are in them comes with carbon, but I'd like to swap that out for something else, like the Fluval biomax but smaller. Anyone have ideas or suggestions? Maybe get some more foam and cut it to fit in the boxes?
I do have a pair of sponge filters in case these don't work out, but hoping they do.
Thanks all