hey raddish, I posted a thread about three weeks ago concerning this. I ran into the same problem. I tried the trick and it didn't work. It caused my water to go cloudy. It seems to work for some, and not work for others. I think it depends on the filter. You should backwash immediatly if you feel its not working. It may take a few backwashes to get all the DE out, but once you do, run the filter 24/7 for a few days and it should clear up.