Its important that the pH level of your pool is balanced. If the pH is too low, this can cause skin and eye irritation, corrosion to pumps and other pool equipment and it can even have a negative impact on the chlorine levels of your pool. This can lead to unhygienic bathing water and damage to your pool, so its important to keep pH levels balanced. Pro-Kleens pH Increaser offers a quick and easy way to increase the pH level of your pool with ease. Pro-Kleens pH Increaser is an additive to help increase the pH levels in swimming pools. It has a naturally high pH level of around 11.3 and 11.7 and therefore, once this is added to your pool, the pH level of the water will increase. Pro-Kleens pH+ is suitable and safe for use on all hot tubs, spas and pools to keep pH levels at the desired level helping to maintain a safe bathing environment. ProKleen pH Increaser Granules for Hot Tubs, Spas & Pools 2 x 1KG in Clear