ok so i need some advice not sure if this setup i have is even doing anything i have a 20 gallon acrylic sump tank in the first bank is where the overflow water comes in then there is a divider with 10 holes the size a a pen to slow the water i guess in the second bank is bio balls and a peice of filter floss then another divider with around 30 holes smaller than the first. finally in the last bank there is a protien skimmer surrounded by a pile of bio balls with two pumps a pump for the skimmer and a return pump my question is i guess is it really doing anything i looked on youtube at alot of differnt styles i just dont know what works and what doesnt any advice on what i can change in the sump tank is helpful thanks