i would like to get a 72 or 90 gallon bow front i can get either for a very good price my question is this can i use a megaflow overflow with just a canister filter like the fluval 405 and have a undergravel filter would this work or would it be better to use the fluval with external plumbing? i want a clean install this will be my third tank the other two i have had in the past used simple power filters this is my first chance to go for a nice tank please help

