For the past month I have been noticing light blue particles sitting on my white steps and in the Dolphin pool cleaner filters. When you touch this substance it flakes and disintegrates.
I haven't opened the Pentair filter to look at the cartridges. The Raypak pool heater was fired up about a month ago, and wondered if it could be coming from there? Not sure how to tell.
Anyone have any idea what this could be?

The brown are pieces of my 20 year old concrete washing into the pool when it rains.
I haven't opened the Pentair filter to look at the cartridges. The Raypak pool heater was fired up about a month ago, and wondered if it could be coming from there? Not sure how to tell.
Anyone have any idea what this could be?

The brown are pieces of my 20 year old concrete washing into the pool when it rains.