This is a comic-style educational guide for pool owners. It explains why pool water can stay clear while still harboring invisible algae that consumes sanitizer. The story follows a character named Mike who is losing chlorine, and a Professor who teaches him about the S.L.A.M. Protocol, cyanuric acid's role in trapping chlorine, and the need to raise free chlorine to 10% of CYA levels. It also…
This is a comic-style educational guide for pool owners, presented as Issue 3 of a series. It is written for anyone who maintains a swimming pool and struggles with chlorine loss even when the water looks clean. The story uses characters Mike and a Professor to explain invisible algae blooms that consume sanitizer before any green color appears.
The first section explains that algae can reach 30 to 40 parts per million without changing water color, and that this invisible population eats active chlorine faster than it can be applied. The Professor introduces the S.L.A.M. Protocol as a way to break the stalemate by shocking the pool with enough chlorine to overpower the hidden algae.
Next, the guide covers cyanuric acid (CYA), which protects chlorine from sunlight but also traps it. High CYA levels release only a small trickle of active hypochlorous acid, which gets overwhelmed by algae. The solution is to raise free chlorine to at least 10% of the CYA level-for example, 6.0 ppm when CYA is 60 ppm.
The final section introduces Fast-Fate, the Phosphate Phantom, a character representing dissolved phosphates from lawn dust and debris. Phosphates feed algae even after chlorine kills the visible cells. The guide explains that lanthanum-based algaecides lock onto orthophosphates and precipitate them out of solution so the filter can trap them, starving the algae of food.