pH is a scale from 0-14 that is used to measure how acidic (low pH) or alkaline (high pH) something is.
In most cases, pool and spa water should be maintained at a pH of 7.2 - 7.6.
Proper pH for a pool or spa helps protect equipment, allows the chemical products to work more efficiently and makes the water comfortable to use.
Low pH in a pool or spa can cause chlorine to be lost more quickly, can cause skin and eye irritation, will wrinkle vinyl liners, cause pitting in concrete or gunite pools, corrode equipment, and dissolve metals from plumbing.
High pH in a pool or spa can cause scaling to form, will cause cloudy water, and cause poor chlorine efficiency.
Remember to keep your pH balanced so that you can enjoy your pool or spa.
