Well, my filter just isn't cutting it. I'll admit that I got the cheapest I could find that would fit in my tank because I thought it would work out fine. It hasn't. Even thought the tank is cycled I can't get amonia down to 0 and then have it stay at 0. So, rather than buy a new one I'd like to fix up the one I have. It's an AquaTech Power Filter 5-15, HOB, and filters 105 GPH. I bought some filter floss and ceramic beads to put into it, I'm just a bit confused on what to add where to maximize he filters potential.