I wish to use some D.E. powder to supplement my sand filters. I have a couple of questions for ya'll.
1) Since I have two sand filters for the pool, does that mean I'll need to use twice as much to get the PSI to raise by 1? I ask this because usually the first filter in line gets dirty a lot sooner than the second. I'm worried that it's not going to distribute evenly and the first filter will raise by 1 and nothing on the second filter.
2) When should I stop using D.E.? I've read that you should replace it after every backwash, but will there be a point at which it's no longer as beneficial?
Thanks in advance, and sorry if this is not where I should have posted this