I have a fluval canister filter that is a pain in the *** to clean, because i apparently am not doing it incorrectly. Every time i do clean it, i wind up with lots of dirty water on the floor and also the intake valves every where except where they belong. I am looking to get a new hang on back filter that has a UV sterilization for my aquarium that works for a 55 gal aquarium any advice on which one to get would be helpful.