The Science of Off-Season Pool Care.

The Science of Off-Season Pool Care

A Homeowner's Guide to Protecting Your Pool Through Winter

Most pool owners think their pool care ends the day the cover goes on. The water gets too cold to swim in, the equipment shuts down, and nobody looks at it again until spring.

That gap, the five or six months nobody's testing the water, is when most of the real damage to a pool happens. Not the damage you can see right away. The kind that shows up two or three years later as a cracked, pitted plaster surface or a wrinkled vinyl liner, and by then it's too late to do anything but pay for it.

This book is built around the Langelier Saturation Index (LSI), the same chemistry municipal water treatment plants have relied on since the 1930s to figure out whether water is corroding pipes or clogging them with scale. Applied to your pool, it tells you whether your water is aggressive, scaling, or balanced, and that balance shifts through the winter as your water cools, whether you add a single chemical or not.

Inside, you'll find:

• What the LSI actually measures, and why temperature makes it a winter problem specifically
• What corrosive and scaling water each do to your surface, covering plaster, fiberglass, and vinyl pools separately
• What the same chemistry does to heaters, salt cells, and metal equipment, not just what you can see
• A straightforward monthly testing and correction routine you can run yourself, all winter, with a decent test kit and about thirty minutes
• A full worked LSI calculation, a spring reopening audit, and quick reference targets by surface type

This isn't a sales pitch dressed up as science. It's the exact program Pools Scientific runs on its own client base, real pools with real money at stake, where 95 percent of clients choose to enroll once they understand what the water is doing to their investment over a winter.

Written by John Cooper, founder of Pools Scientific, M.S. Nuclear Engineering, B.S. Chemical Engineering, U.S. Navy submarine veteran, and five time PHTA certified pool professional.

Your pool is doing one of two things every day it sits closed: protecting the investment you made in it, or working against it. This book is how you find out which.