they are all in a 60gallon right now. no fighting between the aros, but my jar and pbass are nipping each other. besides that its been good for 3 months now.
you need to add a fluval fx5 to that. or an ehiem. get a big canister. canisters hold way more media than the ac110s. right now on my 90gallon i have an ac110 and a fluval 405 with an ac70 power head for added circulation. right now its stocked with 4 piranhas about 8 inches and thats a little more than adequate filtration. with the stock list you mentioned you need to have about 8x turn over. so i'd either an fluval fx5 or a rena filstar xp4.