Hows your progress going stma? seems like it takes about 2/3 of a cup of DE to get 1-2 psi rise on my system. let it run all night and it has only risen about 5 psi. not sure if thats a good rise or if it should have climbed quicker lol, anyways I`m going to do like Ben suggested and wait till I get 7-10 increase then backwash and add more