I am wondering why the recommended level for TA for an inground plaster pool using liquid chlorine is 60-80 in the TF Pool School and 100-120 in my TF-100 test kit instructions. Does climate have anything to do with it? I am in Tucson, AZ. My local pool supply store recommends 80-120. Also, other sources I have checked recommend 80-120.
Question about recommended TA level
- Thread starter Grandma Chris
- Start date
- Feb 6, 2015
- 7,813
- Pool Size
- 12300
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-45 Plus
Welcome to finally posting TFP!
I see you've been a member for over5 years.
TFP recommended parameters have evolved. Use the PoolSchool numbers. The TF-100 kit instructions are being modified. If your test kit is a few years old like mine, the instructions do not refledtthe most recent recommendations.
Pool stores recommendations are usually based off of pool owners using TriChlor pucks, which are acidic. Being acidic, they lower the pH as well - and lower the TA in the process. Using liquid chlorine does not affect the pH and hence does not lower the TA.
A TA of 60-80 will slow your pH rise. Being in Tucson, your fill water TA is probably in the 100-130 ppm range. With high evaporation, you will be working on getting the TA into the recommended range.
I see you've been a member for over5 years.
TFP recommended parameters have evolved. Use the PoolSchool numbers. The TF-100 kit instructions are being modified. If your test kit is a few years old like mine, the instructions do not refledtthe most recent recommendations.
Pool stores recommendations are usually based off of pool owners using TriChlor pucks, which are acidic. Being acidic, they lower the pH as well - and lower the TA in the process. Using liquid chlorine does not affect the pH and hence does not lower the TA.
A TA of 60-80 will slow your pH rise. Being in Tucson, your fill water TA is probably in the 100-130 ppm range. With high evaporation, you will be working on getting the TA into the recommended range.