would a 75 gallon be able to hold a clownk knife full life with tiger oscar full life? i would get both farely young idk tiger oscar 6 inch so the knife wont swallow and the knife start of at 8-9 inch. ive seen youtube videos them together but with many otehr fish as well in larger aquariums but clown knifes minimum tank size is 50 gallons only since these beutiea re awesome but dont use up to much space and the oscar will prob not bug it to much considering the clownknife gets pretty big. so would this work tiger oscar clown knife 75 full life but if so what kinda filyer(s) would i need