If your pool hasn't got enough p H & is irritating your skin or eyes the Clearwater 1kg p H increaser is the perfect solution & is a highly effective method. If the p H levels in your pool drop below 7.2 the acidity in the water increases & you will need to use the p H treatment. The recommended p H balance is between 7.2 & 7.6. The p H balance in the pool water can be changed by bugs, cosmetics, leaves & even urine. To use the p H increaser is easy to use. After the recommended amount p H chemicals have been dissolved on warm water you just add this solution in the pool water thus increasing the levels. To make sure that this has worked you test the water again & adjust according. All warnings & instructions must be adhered to, which are clearly labelled on the packaging.