Setting up 135 gallon aquarium for my two young aligator snapping turtles. I plan to have a few sunfish in the aquarium also, as I've had fish that lasted with them before. Im planning on either 2 aquatop cf500uv filters or 1 aquatop and 1 fluval 406. Is this enough or could I get much better filter for around the same price as the 2 I mentioned combined.