I have a new 38 gallon tank that I got for Christmas that I want to set up for a freshwater tank. I'm currently using a Penguin Bio-wheel on my daughter's 10 gallon tank, and I have a whisper on my other daughters 2.5 gallon tank. I'm wondering what would be the better filter type/brand for my new 38 gallon setup? I was kind of leaning towards the Penguin Bio-wheel for that also, but one of the guys at our local aquarium store said that they are nothing but hype? Any recommendations are appreciated.