My 40 gallon breeder has about 17 juvenile peacocks ( most around 2 inches) and currently has a aqua clear 50 and a sponge filter running. I recently picked up a aqua clear 70 for 5 bucks that I was thinking about adding on as well. I change about 50% of my water a week but wanted to add on the extra filter to help balance the bioload since I am abut over stocked. I was wondering what peoples thoughts were on this amount of filtration and whether it would be helpful or just overkill. Any thoughts would be greatly appreciated.