An FYI for iron stains...

I had mystery iron stains cropping up last year, mainly on the steps and around the bottom of the liner, where the wall meets the floor. I treated and removed, but they are back upon opening this year.

Due to a new leak (I let my husband scoop leaves--don't get me started), I removed the light fixture to check the gaskets for leakage. I could not believe the amount of rust inside the housing! I had my service guys over replacing the sand, and they mentioned that acidic conditions could cause the rust. Now, I am VERY careful about keeping well-stocked with Borax and Ph levels up. However, the man who sold us the house never was--I know this because we had to replace the liner that wrinkled ALL OVER because of the low Ph levels.

Anyway, you might want to check that light, especially when there seems to be no other source of the metal stains.