i have a reef octopus NWB200 on a mix 180 gallon tank but it don't look like is not doing the job well, because i am fighting with red slime in the tank and i have a lot of flow with 4 MP40's and 2 640 gph Koralias plus my return pump mag 18, but i do have 4 clown, 5 anthias, 2 tang, 1 angel, 1 goby and 1 wrasse that i am feeding well, so i am planning to get a bigger skimmer what i wanted to see what you guys recommend to get, i am looking at the Bubble Magus hero 77 rated for 185-400 or the BM-NAC9 rated for 395-530 or the Diablo XS350 rated for 400, unless you guys have some other ideas please help. thanks