the algae will keep growing and start to fall off the screen. over time i guess it return no3 po4 to the tank but have to really not clean it 4 a while. screens are self contained depending on the set up mine is in a 5 gal bucket. no way to fall in the tank.same evaporation with and without the scrubber about 5gal every 2-3 days.not sure on 02
Last edited: