upgrading my 125 community to a 6 ft, 180 tank, the stock will not change, big fish will be 2x blood parrots, 1x KK parrot and 2 severums. Bottom big fish is a bgk. of course I have my lemons,DG, and a ton of emerald cats. This will be there permanent home, IF my filtration keeps the water clean in a 125; would you keep it the same and add a power head, for added circulation. I am obsessed with over filtration but if it works, why knock it