I was testing it myself Simmons. At one point this year, I had to add 14 bags of shock before I could get the level to hold overnight. My liner had already faded by then for the most part, so I didn't really care if I faded it more at that point. I just wanted to kill that algae. It came back again of course after that, because I didn't know I had to maintain my FC so high.

And you are correct Watermom. All I did to get a quick general idea of the fill water, was stick a test strip in the hose water. It registered the lightest CYA reading on the strip, but I assumed that was a level higher than 0. Now that I look closer, it is indeed 0.


Thanks much both of you.