in my 75 gallon tank i have a 5-6 inch flowerhorn, 2 2 inch convicts, a 3 inch jack dempsey, and a 4 inch pleco. i have a penguin 250, penguin 350, and a magnum350 canister filter in the mail to be here soon. is this enough or just plain overkill. can i do away with the 250 to upgrade my breeder tank?