I have a 240 gallon tank, with a Pro Clear Aquatics wet.dry rated for 300 gallon tanks, which should be plenty of biological filtration. Its also going to take me awhile before I have this tank fully stocked, but when the time comes that I do, what other filter could I get to help polish the water? I dont need it bottled water clear, so what a big canister work with the correct media? Or any other ideas?