How to lower pool pH: step-by-step with pH decreaser
Use pH decreaser (sodium bisulfate) to lower your pool pH. Add 10 grams per 10,000 litres dissolved in water to lower pH by 0.1. Wait 4 hours and retest.
Pool expertise for home owners
Crystal clear pool water.
No hassle.
Practical tips, maintenance guides and honest product recommendations for residential pool owners across Europe.
Topics
Everything about pool care
From pH testing to winterizing. Practical knowledge for every pool owner.
Water quality
pH levels, chlorine, alkalinity and hardness. Everything about your pool water.
Maintenance
From daily cleaning to winterizing. Keep your pool in top condition all year.
Components
Filter pumps, covers and more. All about the parts of your pool explained.
Guides
Step-by-step instructions for the most common pool maintenance tasks.
Products
Honest recommendations for pool robots, test kits, pumps and more.
Latest articles
All articles
Learn everything about your pool
How to raise pool pH: step-by-step with pH increaser
Use pH increaser (sodium carbonate / soda ash) to raise your pool pH. Add 10 grams per 10,000 litres dissolved in water to raise pH by approximately 0.1. Wait 4 hours and retest.
Cloudy pool water: causes and how to fix it
Cloudy pool water always has a cause: too little chlorine, pH out of range, clogged filter or algae growth. Identify the cause and apply the right solution. Most cases clear within 24 to 48 hours.
How to test pool water: methods, timing and best kits
Test pool pH and chlorine at least 2 to 3 times per week. Use test strips for daily checks, a digital tester or DPD kit for accurate measurements. Always test in the morning before swimming.
Opening your pool in spring: step-by-step guide
Open your pool correctly in spring: remove the cover, clean the filter, treat the water and balance the chemistry. Plan 1 to 2 weekends for the opening process.
Pool chlorine: how much, when and how to add it
The ideal free chlorine level for a pool is 1.0 to 3.0 mg/l. Use slow-dissolving 200g tablets in a floating dispenser or the skimmer. Never throw tablets directly onto the pool surface.