Ok, I determined that I need to add 2 more scoops, since I only added 8 (which is the amount I should do during a backwash).You need about 1 lb of DE per 10 square feet of filter surface area.
So, that's about 4.8 lbs.
1 lb is about 48 fluid ounces.
So, that's about 230 fluid ounces.
I just remembered that I did let the backwash run for about 30 seconds before taking the filter apart, maybe that cleaned them up a bit?However, if that’s what the grids look like before you hosed them off, then it looks like you might not be using enough DE.
Ok, so how do I find this out? I’m thinking I get in and clean them with a magic eraser and see what comes back. Thoughts?The light face is good stainless. So, something corrosive, like acid or chlorine would need to make contact or possibly there’s some sort of stray current
So that explains the grids... good!Backwash will remove DE from the grids. So, that could account for the lack of DE that we see on the grids.
Ok - I’ll check the metal and make sure it’s smooth. I’m 99% sure it is because last year it was. But I will specifically check it.The stainless steel face of the light should be smooth. If it feels rough, that could be corrosion.
As for exposure to harsh chemicals - I don’t believe they have been. I personally have not exposed them to harsh chemicals. All chemicals are poured into the return stream as I put them into the pool to make sure they get mixed in appropriately and not to harm the pool in any way.If the light was never exposed to harsh chemistry, then you might have some sort of stray current.
All 3 pieces of metal in the pool have the same reaction. The 3 pieces of metal are 2 lights and ladder.Do you have any other metal that's corroding faster than usual?
@mknauss Thank you.Your pH is fine. When you test it at 8, lower it to 7.6.
Right now, it's because of the CSI. You want to keep it within plus or minus .3, and you're close.