The Pool Is Breathing (And Nobody Told You Why) - Friday

Send us Fan MailThis week on Floc-It Friday, Rudy Stankowitz takes aim at one of the most misunderstood concepts in pool chemistry: pH drift. If you've ever been told that pH "just goes up," Rudy has news for you. Water doesn't drift. Chemistry doesn't shrug. And carbon dioxide may be controlling your pool far more than you've been taught. Before diving into chemistry, Rudy opens with a satirical pool industry news segment covering algae in Washington's Reflecting Pool, Leslie's recent financial improvements, private equity acquisitions, above-ground pool recalls, and the growing obsession with smart pool equipment. Topics CoveredBreaking News from the Pool WorldA tongue-in-cheek look at: Algae growth in the Reflecting Pool near the National Mall  "Operation Green Freedom" and a fictional crop-duster copper sulfate deployment  Leslie's reporting improved sales and customer activity  Ongoing consolidation of pool service companies through private equity acquisitions  Above-ground pool recalls making national headlines  The industry's growing fascination with app-connected heat pumps and automation Why "pH Drift" Is a Bad ExplanationRudy challenges one of the industry's most common phrases.Water does not mysteriously "drift."When pH changes, chemistry is causing it.This episode explains why saying pH drift is often an observation rather than an explanation and why understanding the underlying chemistry matters. The Pool Is BreathingOne of the most important concepts discussed:Your swimming pool is continuously exchanging gases with the atmosphere.Topics include: Gas exchange at the air-water interface  Chemical equilibrium  Carbon dioxide movement  Why pools are dynamic systems rather than static containers of water  How atmospheric chemistry influences water chemistry every second of every day Carbon Dioxide: The Hidden Driver of pH RiseMost pool professionals focus on chlorine, alkalinity, calcium hardness, and acid additions.Rudy explains why carbon dioxide deserves far more attention.Learn about: Carbon dioxide dissolution  Carbonic acid formation  The carbonate buffering system  Why carbon dioxide leaving the water causes pH to rise  The relationship between carbon dioxide, bicarbonate, and carbonate chemistry Eric Knight's Brilliant Cyanurate-Alkalinity ExplanationReferencing the June 3rd episode of Rule Your Pool, Rudy revisits Eric Knight's explanation of why cyanurate alkalinity is treated differently depending on the calculation being performed.Discussion includes: Why cyanurate contributes to total alkalinity  How muriatic acid protonates cyanurate ions  The difference between cyanurate ions and cyanuric acid  Why total alkalinity and carbonate alkalinity are not interchangeable  When to use carbonate alkalinity for LSI calculations  Why total alkalinity is still used for acid demand calculations Does pH Still Matter When CYA Is Present?A detailed review of: The FC/CYA relationship  Hypochlorous acid concentration  The effects of pH on sanitizer strength  Why maintaining the proper chlorine-to-CYA ratio matters  Pathogen kill times at different pH levels  Giardia and leptospira examples demonstrating how pH can still influence disinfection performance Total Alkalinity Is Not a ChemicalOne of the central lessons of the episode:Total alkalinity is a measurement, not a substance.Topics include: Buffering capacity  Acid neutralizing capacity  Carbonate and bicarbonate systems  Why alkalinity gets blamed for everything  The difference between cause and effect in water chemistry Le Chatelier's Principle and Pool ChemistryRudy breaks down one of chemistry's most important concepts into practical pool language.Learn: What happens when equilibrium is disturbed  How the carbonate system responds to carbon dioxide loss  Why hydrogen ion concentration changes  The actual mechanism behind rising pH Why Waterfalls, Spas, Bubblers, and Deck Jets Raise pHIf your backyard resembles a miniature Bellagio, this section is for you.Topics include: Aeration and turbulence  Increased gas exchange  Carbon dioxide stripping  Why decorative water features often accelerate pH rise  Understanding the relationship between aeration and water balance Salt Systems and pH RiseA common misconception is addressed:Salt systems do not create pH.Instead, they create conditions that accelerate carbon dioxide loss.Discussion includes: Hydrogen gas production  Increased turbulence  Gas transfer dynamics  Why salt pools often experience persistent pH rise Acid and Aeration: The Ultimate DemonstrationRudy explains why the classic acid-and-aeration method for lowering total alkalinity proves that carbon dioxide—not alkalinity—is driving pH rise.A practical chemistry lesson every service technician should understand. Key Takeaways pH does not mysteriously drift.  Carbon dioxide is often the real driver of pH rise.  Total alkalinity is a measurement, not a chemical.  Aeration accelerates carbon dioxide loss.  Salt systems indirectly contribute to rising pH by increasing gas exchange.  Understanding equilibrium makes pool chemistry easier to predict.  Once you understand carbon dioxide, many long-standing pool chemistry mysteries disappear. 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