Bob Lowry Explains Why Borates Are a Game-Changer
Borates have become one of the most practical “set it and forget it” upgrades in modern pool chemistry, especially for pool service pros managing a weekly route. The big appeal is simple: borates are typically a one-time addition that you only verify occasionally, yet they deliver ongoing benefits in swimming pool maintenance. At the recommended borate level of about 50 ppm, they act as a secondary pH buffer that helps slow the upward pH drift many pools experience. That matters most in saltwater chlorine generator pools, and in pools with constant aeration like spillovers, waterfalls, negative edge designs, or heavy return turbulence, where carbon dioxide outgassing pushes pH higher and higher. The second benefit is algae prevention. Borates are best described as an algostat rather than an algaecide: they do not “kill” algae the way chlorine does, but they can make it harder for algae to get started. That distinction is important for realistic expectations and for sanitation. You stil...