I added a pound or so of cal hypo to a 10k pool yesterday as chlorine was at 1 and ch was at 270. I got a message today asking what I did as the pool was slightly cloudy and there was a slight green tint in the pool
Ph 8 (1 drop of acid demand to reach 7.8)
He filled the spillway (infinity edge pool) a week or so ago. It was low but I don't know if he used the city water or the well water.
I will take a look at the cartridge next week. It's actually a three week old jacuzzi filter but I'm betting it's not a pleatco in there. I think I should be able to pick up some test strips for metal at the pool store, but what to do if it does test positive for metal. Should I just leave it alone. I've never used sequestrants before.