The best pool chemistry advice is the kind you can use on your next route. We sit down with Terry Arco to share how Bob Lowry’s teachings are being refined into fast, field-ready training for residential service pros, plus a major update to the IPSA manuals that shaped a generation of technicians. If you’ve ever held chlorine at 3 ppm and still fought algae, or watched CYA granules sit on the floor in cold water, this walkthrough connects the dots between LSI, stabilizer, and free chlorine in a way that saves time and reduces callbacks.

Terry explains how a six-hour class became a tight, high-impact course based on Lowry’s 26-page Pool Chemistry for Service Pros. We unpack the three recurring challenges on most routes—water balance swings, misunderstood CYA behavior, and persistent algae despite “right” chlorine levels—and show how to solve them with clear targets and better testing. Expect actionable tips on managing LSI to avoid scale and corrosion, setting free chlorine relative to CYA and sunlight, and using aeration demos to see pH dynamics in real time.

We also highlight HASA’s stewardship of Bob’s work, including updated IPSA training manuals and a Spanish edition in progress, while honoring the way Bob bridged lab smarts with backyard realities. From liquid pool conditioner to phone calls returned, his legacy is practical chemistry that respects the craft and the clock. The 2026 schedule brings these condensed courses to major shows and regional events nationwide, so you can level up without losing a day on the route.

• Abridged course drawn from Pool Chemistry for Service Pros
• Focus on LSI for scale and corrosion control
• Practical CYA management tied to sunlight and chlorine strength
• Rethinking fixed free chlorine targets to prevent algae
• Demonstrations on aeration and pH behavior
• HASA stewardship of Bob Lowry copyrights
• IPSA manuals updated and Spanish versions in development
• 2026 training at Western, Southwest, Florida, Arizona, and Fresno events

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