Water replacement...am I approaching this correctly?

[Newpoolcrazy]

Out of CYA reagent. It's on order, but it's late. I know a little rain doesn't make a difference with most things, but we were in that rain event where we drained about a foot of water out of our pool in 3 inch increments and it was replaced by rain water each time. Do you think this will lower my CYA much?

What I'm doing is still shooting for the same FC as if my pool still had a CYA of 50 until I can test and see if it was lowered enough to need adjustment. Is this how I should proceed? I don't want my pool over chlorinated, but since no one is swimming because of weather anyway, I assume a little on the high side is better then low, yes?

See? Just when we think I've got it, I get all newbie on you again.

 

[jblizzle]

Replacing 1 foot of water in increments lowered the CYA by 20-25%

Safe to swim up to shock level FC, so I would certainly err on the high side.

 

[kimkats]

Not a bad question at all. (no question is bad) With that much rain/drain your CYA will be lower.

Kim

 

[Newpoolcrazy]

So I could be down to a CYA of 40ish. I'm sticking with the plan. Thank you for helping me feel better in that decision.

Replacing 1 foot of water in increments lowered the CYA by 20-25%

Safe to swim up to shock level FC, so I would certainly err on the high side.