Pretty much just like it says wondering which is better? This may be a dumb question but i havent had a lot of personal experience with either. The corallfe would be a super skimmer 220. I know its rated for a higher gallon tank. Both would be purchased used. I already have the Aqua C remora but found a decent deal on the coral life 220. This will be under or on the back of the 46 bowfront in my room. Thanks