Hey, I have a 55 gallon corner tank that I used before our move. I used a bak-pak skimmer and a cascade canister filter. I still have the Aragonite in a container. I don't want a reef tank, just a few fish and cleaners. Do I need to use, both the skimmer and canister filter? Can I use the aragonite, or should I use something else since it's not a reef tank and old? Thanks! Any other suggestions would be great too.