Being a good forum user, I went through EVERY thread title in this forum searching for advice on how to add DE to a sand filter for better filtration.

What I've come up with is to add a little DE (little being 1/3 cup at a time) until you see a 1 PSI increase in pool pressure after a fresh backwashing. Obviously this can take some time as you have to watch/wait for any change in PSI to occur.

What I'd like to know is do I have to add DE after EVERY backwash?