Hi:i am new to this sight,i have a 75 gallon tank running 1 marineland c-220 and 1 marineland c-360 canister filters turning the tank 580gph.like i said i have 1 oscar,2 jack dempsy,and a breeding pair of albino bristlenose pleco's.i want to know if i need to get rid of the pleco's?have read different views on this and i only have about 9months of experience in aquatics.the oscar and jack dempsy's are juvi's still,the pleco's will only grow to about 4 1/5 to 5" (so i researched before i bought them)the reason i have them is because they were in a 38gallon tank but i had to get rid of the tank.thanks for any input.oh and i do not feed the oscar live fish he does not seem agressive at the moment but i know he is not mature yet also.he is about 4 1/2" long right now.he has been with the pleco's sence he was 2".thanks for any input on this matter