what chemical is used to lower ph in a pool
Low pH (acidic water) can also corrode metal parts of a pool system and damage the plaster finish. The State standard for pH is 7.2 â 8.0 (Recommended range 7.4â7.6). To lower the pH, muriatic (hydrochloric) acid must be added. It is advisable to add the desired amount of acid to a full (plastic) bucket of water before adding to the pool. (Acid introduced directly can stain the pool wall.) To raise the pH, soda ash (sodium carbonate) must be added. ALKALINITY Alkaline (basic) substances are present in all water. Within the 7.2â7.8 pH range, alkalinity exists as a bicarbonate material.