Thanks I am running a sunsun 404b canister, with Finnex 24/7 lighting on a 75 gal..I like keeping cichlids, nice color, and very active fish..great group..You can use any sort of filter with cichlids but some fish dig and that can stop an undergravel filter working effectively. And if the fish have babies a power filter could suck them up. Air operated sponge filters work well for small species in breeding tanks or a trickle filter/ sump can be used on bigger tanks with large fish.