what omar said. its a skim machine. i had a heavy load in my tank. i had 2 clown fish, 7 green chromis, and a yellow tang and i wanted dry skimate so i keep mines a little higher than recommended and i had to empty the collection cup once a week. never had water overflow
bh1000 reef octopus -100
48" odyssea 4 bulb t5 with LED moon lights-80
sand+rocks-50
sump-20
powerheads and heater-20
additives and chemicals for free with purchase