Thanks for all the quick responses. Im looking for the best bang for you buck filter with the least amount of maintenance. right now the tank has a tetra whisper ex70 and a marineland H.O.T. Magnum that came with it. I am using it for 3 small koi fish (working on a pond for when they get bigger and using this one to keep them when they are small). I have one little live plant in it but would like more. looking to spend in the $100-$250 price range.