The liner is vinyl

Pool is starting to clear up going to a lighter green. Water is real cloudy

Keep brushing and working to keep FC at higher levels above 20.

I wonder if filter is not working properly, pressure gage does not seem to register properly. Any thought on that? I do have another pressure gage that I could replace.

A couple of years ago I replace the sand in the filter. Do I need to do anything different to sand, I did move it around to eliminate the channels that formed in the sand.

Thanks