Hi. I moved into a house with a pool two years ago and have been struggling to keep it well-behaved ever since, since I've never worked with pools before.
I have an FNS Plus 60 sq. ft. DE filter which I cleaned today after seeing the pressure go up 10 psi or more over the indicated starting point. I noticed some of the grids have been worn out pretty badly and cleaning the grids thoroughly is practically impossible since the bolts at the top thing are rusted in place. I did the best I could, dumped the 7.5 pounds of DE in the pool skimmer and waited a few hours, and the pressure is still high.
I feel like I need a new filter, but a new DE filter is too much for us to afford right now, and I need some professional advice on what I should do. Thanks!
Edit: I added some PhosFree and forgot to read the label which clearly states that it raises pressure. Oh well. Main concern still stands!