Hello guys and girls, I'm new to the forum. I just brought a 270 gallon glass tank. It is a predrilled tank it has 5 holes. I was wondering which filter will work best. It will be freshwater tank. It will be housing two peacock bass, tiger shovle nose hybrid catfish and a retail catfish. I have experince on both canister and wet dry filter. I read somewhere that you cannot use the a canister filter on a predrilled tank is this true?