I just moved into my new house in Bradenton, FL. It has a small (probably under 10000 gallons) in-ground plaster/tile/concrete pool, built in 2004. Cartridge filter, pump running 10 hours a day. Water looks decent to my untrained eye. No algae. Previous owner used a pool service to clean pool / adjust chemicals once a week.
I got my new TF100 test kit today. Here are my results from tonight:
From reading this forum, it looks like I need to add chlorine (bleach) to get my FC up to 4, and also add muriatic acid to lower PH to 7.5
I'm concerned about the CH. My city tap water has a CH of 160. If I want to lower the CH of the pool from 590 to 260, I need to replace 77% of the water with new tap water, according to the pool calculator.
My questions are:
1. Should I do a partial drain/refill? I would probably use the plastic sheet method to replace water, as I'm worried about high water table
2. If I am going to do a drain/refill, should I still adjust the PH and FC, or wait until after the pool is refilled?
Thanks for any advice. I'm excited about learning everything I can from this forum.