Hello! I wanted to know how to make a (Good) sump pump? I wanted to know what were the most important components that are need and why? Also what are the pros and cons of sumps? I currently have a 125 gallon with (2) penguin power filters 350 a Eheim 2217 and a cascade 1000. I notice the my fish poop floats around alot and maybe the sump would correct the problem. Thanks