RANKEM ph indicator ph 4.0 to 11  (500 ml)

This universal indicator solution is perfect for testing the pH of your tap, ground or RO water. Simply add a few drops to the water sample and instantly see the pH level from the color change on the included color chart (pH 4.0-11.0). A versatile liquid, it works just as well for testing pools, aquariums or other solutions where pH is important. Conveniently packaged in a 500ml bottle, this indicator solution provides hundreds of tests so you can monitor the water in multiple locations with ease. An affordable way to maintain the right pH balance.