I have a Whisper 10i in a 10 gallon tank but it just doesn't seem to be keeping up with the waste my turtle is producing. There's just a bare bottom for right now, no substrate, but it doesn't seem to be able to push the water around. Do I have the right size for the tank, or do I need a more powerful filter? Also, If I do need a more powerful filter, how would I break the current so that it's not as strong but keep the flow good?

