I have had a bk 180 on my 75gallon tank for since april. It is silent, well built, and easy to clean. That being said, i am dissapointed in the amount of skimmate it produces. I think the pump may be under powered for the skimmer. I get a light to medium dark green skimmate, about an inch collected in the cup in about a weeks time. Stock list includes 4" hippo tang, flame angel, royal gramma, clown, purple fire fish, bangai cardinal. I dose vodka and mb 7 and the tank is spotlessly clean, so maybe it's just pulling everything out? Before adding a cuc I did get a build up of algae on the LR, but with 18 turbo's and 8 hermits, I have zero algae or cyno. Lighting is 4 t5 on icecap and 2 vho super actinic. Also run gfo and carbon. Not sure if another skimmer would pull more skimmate or not....