Pentair IntellipH pH Controller with Acid Container, 4 Gallon, 521377

The Pentair 521377 IntellipH is an automatic pH controller supplied with a 4 gallon acid container. It doses muriatic acid into the pool as needed so the pH sits where it should instead of drifting between service visits.

Why pH will not hold still

Pool water does not stay in balance on its own, and a salt pool in particular tends to climb in pH as chlorine is generated. The usual answer is someone with a jug of acid every few days, which produces a sawtooth: too high, corrected too far, back up again. Continuous small corrections hold a flatter line, and that is what an automatic controller is for.

Working alongside IntelliChlor

IntellipH is designed as the companion to the IntelliChlor salt chlorine generator. The chlorinator handles sanitizer, the controller handles balance, and between them the water stays clear without a manual dosing routine.

The container

Acid lives in the supplied 4 gallon container rather than in an open jug at the pool edge, and the system meters it out. Refills come around far less often than manual dosing did.