Chlorine Lock is Fake… and the Industry Let You Believe It Anyway

Pool Pros text questions here

This episode starts where most pool problems actually begin—not in the chemistry… but in the math. Rudy breaks down why inconsistent dosing is quietly wrecking pools everywhere, how “close enough” turns into repeat problems, and why scooping chemicals like you’re baking cookies is one of the biggest operational failures in the industry.

From there, the conversation escalates into real chemistry—chlorine demand, the science behind oxidation, and why chlorine never just “disappears”… it reacts.

Then we get into the controversy everyone keeps asking about:
Is sodium bromide coming back?
Rudy explains what’s really happening behind the scenes with regulatory restrictions, what the EPA is actually concerned about, and why this has nothing to do with whether bromine works—and everything to do with what might happen under worst-case conditions.

⚠️ What You’ll Learn in This Episode

• Why most pool problems are not mysterious—they’re bad dosing and inconsistent inputs
• The critical difference between volume vs. weight and how bulk density quietly sabotages your results
• How underdosing fuels contamination—and overdosing creates new problems
• Why chloramines (not chlorine) cause smell and irritation
• The real reason your pool “won’t hold chlorine” (hint: it’s not magic)
• Why “chlorine lock” is not a real chemistry term—and what’s actually happening instead
• How sunlight, ammonia, organics, and biofilms all compete for chlorine simultaneously
• The role of hypochlorous acid vs. hypochlorite ion and why pH changes everything
• What chlorine demand really is—and how to diagnose it correctly

🧬 The Bromine Conversation (What Everyone’s Asking)

• Why sodium bromide was restricted in outdoor pools
• What the EPA actually said (and didn’t say)
• The real concern: potential bromate formation under certain conditions

AquaStar Pool Products
The Global Leader in Safety, Dependability, & Innovation in Pool Technology.

POOL MAGAZINE
Pool Magazine is leading up to the minute news source for Swimming Pool News and Pool Features. Ou

the 'How to Get Rid of Algae' handbook
The most comprehensive guide on algae prevention and remediation you will ever own.

BLUERAY XL
The real mineral purifier! Reduce your pool maintenance costs & efforts by 50%

CPO Certification Classes
Attend your CPO class with Rudy Stankowitz!

Online Pool Classes
The difference between you and your competition is what you know!

Jack's Magic
If you know Jack's you'd have no stains!

Service Industry News


Disclaimer: This post contains affiliate links. If you make a purchase, I may receive a commission at no extra cost to you.

Support the show

Thank you so much for listening! You can find us on social media:

• Facebook
• Instagram
• Tik Tok

Email us: [e-mail]