To lower the pH in a pool, two common and effective chemicals are typically used: sodium bisulfate (also called pH decreaser or dry acid) and muriatic acid (hydrochloric acid). Sodium bisulfate is a safer powder form, while muriatic acid is a strong liquid acid that requires careful handling with protective gear. Both chemicals are added to the pool water near the return jets with the filtration system running. It is important to test the pH beforehand and after treatment to ensure levels fall within the ideal range of 7.4 to 7.6. Adding small amounts gradually is recommended to avoid overcorrecting. There are also natural ways to lower pH, such as using lemon juice or vinegar due to their acidic nature, but these require large quantities and may bring impurities or affect pool chemistry negatively. Increasing water temperature and using UV light systems can also help lower pH in a more natural, chemical-free way. Summary of methods:
- Use sodium bisulfate (dry acid) or muriatic acid according to the pool size and measured pH
- Add chemicals near return jets with the pump running
- Test pH level before and after applying chemicals
- Natural alternatives include lemon juice or vinegar, but use cautiously
- UV light and heating pool water can assist lowering pH naturally
Safety precautions are especially important when handling muriatic acid to prevent chemical burns and damage to pool surfaces. This guidance provides a comprehensive approach to effectively lower pool pH either chemically or through more natural means, maintaining balanced, clear, and safe pool water.
