I have recently acquired a new 20 gallon tank that came with a Fluval 3 plus filter already running. This is the only filter I intend to use in this tank, and was just going to empty and clean the tank (glass covered in algae), renew the foam pads in the filter but tear a piece off the old pads to help seed the new ones. I was also going to add some gravel from my current tank to see if that speeds things up. Am i right in thinking that polyester pads or carbon pads are not absolutely necessary, and I can run the Fluval 3 plus with just the two main foam pads, cleaning them in rotation? Will this one filter system be okay for my tank, or do I need to combine it with
UGF also?