hey everyone i have a question. when i bought my 55gallon tank used it came with a large bio wheel filter and a skimmer. i have added a 20 gal
long sump with live rock, live sand, a bubble trap and moved my skimmer to the sump. my question is do i still need the bio wheel hang on back filter, i do also have to power heads in the tanks and well as my sump return for circulation. and my overflow box has a foam filter in it also so i was needing to know do i need the hang on back bio wheel?