ok so i more and more everyday find myself thinking about doing a sump setup on a future tank and the question is would a all glass megaflow like these http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=13648&c=3578+3587 really be good enough for the tank size they say or do u use the rule of ok it says for up to 55gal so on my 55 i should use two? or will sumps filter what they say they will. granted i know they still need a good micanical filter too and sumps are really just great bio filters but i still think they look good when done right