I have a 29 gallon fish only freshwater tank. It has a Marineland 150 BIO-wheel filter. It's rated for a max of 30 gallons. Would it be a good idea to either get a bigger filter or add and additional filter top the tank? I have 3 platys and 2 cory cats in it now but I do want to add more fish once the tank i Also I have the heard a better filter than the Bio-wheel is the Aqua Clear any opinions regarding which is better is the long run./
