It's because your surface is vinyl and ergo you don't actually need calcium at all.
Just checked the FC with a test strip and it is still 10 ppm. The sun didn't bring it down at all (sunny day all day). so we couldn't wait and jumped in the pool. Great fun, but the whole family smells like clean underwear.
Laugh of the day. Thanks!!but the whole family smells like clean underwear.
Each 8 oz trichlor puck raises CYA by 2.4. If you're reading 30 higher than you targeted, did you use 12 pucks already? If so, everything is behaving exactly as it should.Uh oh. Things are changing. Everything was going along just swimmingly and then today's measurements are
Temp=79
FC=5
CC=0
pH=7.4
CYA=50
[yesterday - we had a major rainstorm]
The CYA snuck up on me. It was about a week ago when I put in about 20 ppm worth of stabilizer and ran out of chemical. I then used pucks mostly for chlorine addition and CYA addition. But now I'm way over. How did I get so far out?
I'm going to remove the pucks now and regroup.
Any thoughts on what is going on?
I think I need to go to the pool store and get a sample to double check.
I carried the container around the room and sure enough, I could get the dot to appear or disappear depending on what was in the background and the light source.