This whole filter thing is driving me crazy. I have this really haggard hanger filter in my tank now and the water isn't doing so well. I'm upgrading Prometheus into a 50 gallon tank and I was wondering what would be the best filter situation. I was thinking about buying this:
http://www.petsmart.com/global/product_detail.jsp?PRODUCT%3C%3Eprd_id=845524441782184&FOLDER%3C%3Efolder_id=2534374302030549&ASSORTMENT%3C%3East_id=2534374302023693&bmUID=1126383728100
Is this the best way to go for my filter needs throughout Prometheus' life? Do I still need those biological ring things? I live in a dorm room and it's ideal that I have as little mess as possible with as little noise as possible. Thanks everybody, maybe someday I'll know what I'm doing.

