I just finished cleaning my DE filter and discovered some rust on the wingnuts that hold the grids in place. Also there is a metal band that runs around the inside of the lower half of the filter shell that has developed some surface rust. This is the first year i have seen this. Additionally I was having issues with stains in the pool at the end of last season.
I had a big fight with low ph last year and think this is the cause. Will the surface rust on the wingnuts and interior metal band adversley effect the pool this season?