due to a pretty good deal from this past weekend. i acquired some pretty decent filtration from a larger tank. the bigger tank was a 125 w bulkheads that the previous owner sealed up. i will be using a sump for that tank when its all set up. anyways, right now im turning my 55 about 15.5 times an hour. i have an ac110 and rena xp3, and i could add another 300gph with the original filter ( an ac70) if need be, but i think i have plenty now. the tank has been set up for about 6 months w a few african cichlids. i lost interest in that until now because i got a 120 and was stocking that. so, i would like to finish it with a heavily stocked tank since i have the filtration to do so, the tank is already cycled and im ready to buy fish. should i get more africans? or stock it with something else. ive always had an interest in piranhas, what about that? just looking for some cool ideas of unique fish and their tankmates. thanks !