I had read a lot of information about the aerator, and majority said to leave it on and even dump the slurry into the column of bubbles. I did turn it off after I was done last week and it was off all week. I 'll look for some photos of before and I have some from this weekend. Mine look similar to those that chandler1 posted. Although not as clear in the after. Mine looks more like a milky green, but its a definate improvement. Should I add more aluminum sulphate? I could even see some fish and the dark outline of an old sunken cedar tree from two years ago.