Episode 11 · June 30, 2026
Ask John, Part 1
Real pool chemistry questions, real answers
Those first ten episodes were really about one thing. Could you trust the chemistry, and could you trust the guy telling you about it. Starting today, this show turns toward something different.
This is Ask John, Part 1. Four real questions, plus the show’s first So What segment.
Four Real Questions
What You’ll Take Away
- How much UV a screened pool cage actually blocks, and what that means for your chlorine demand
- Why saltwater pools have a real CYA target underneath the 50 ppm ceiling, not a different rule entirely
- A fiberglass scale case, a chemistry fix or renovate?
- Turnover rate: what it really means
- A longtime listener’s pool, and what changed once the guesswork came out of it
Referenced in This Episode
- Episode 3: LSI Explained — Saturation index and the six variables that govern water balance
- Episode 6: The pH Ceiling — Henry’s Law and why pH keeps climbing in salt pools
- Ask John: poolsscientific.com/ask-john — Submit your pool chemistry question
Now Open
The Chemist’s Circle
A real answer for your specific pool, not a general answer built for everyone. There’s also a short bonus episode releasing today, built entirely around what the Circle is, what it costs, and how founding membership works. Full details at poolsscientific.com/chemists-circle.
Next Tuesday — Episode 12
Combined Chlorine and Chloramines
That smell everyone blames on too much chlorine? It’s almost always the opposite problem. Next Tuesday, the chemistry behind the smell, and why it’s evidence your chlorine is losing, not winning.
New episodes every Tuesday.