POOL WATER BALANCE
LOW PH
Low pool pH can make the water uncomfortable and may contribute to corrosion or damage to pool equipment and surfaces. Test the water and raise the pH gradually before swimming.
Lower the pH
Return the water to the recommended range.
Reduce Scale Risk
Help prevent mineral deposits and cloudy water.
Improve Chlorine Performance
Help your sanitiser work more effectively.
Improve Water Comfort
Restore a more comfortable swimming environment.
PRODUCTS TO CORRECT AND MAINTAIN HIGH PH WATER
Lower the pH first, then retest the chlorine and begin normal pool maintenance.
CrystaLux
CrystaLux pH Minus 7kg Pool & Spa pH Reducer
Sale price£19.95
Regular price£23.95
CrystaLux
CrystaLux Stabilised Chlorine Granules 5kg
Sale price£24.99
Regular price£34.95
CrystaLux
CrystaLux Shock Granules 5kg Rapid Pool & Hot Tub Chlorine Boost
Sale price£27.95
Regular price£32.95
HOW TO LOWER HIGH POOL PH
Correct high pH gradually. Test between doses rather than adding a large amount of treatment at once.
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Test the water
Measure the pH and chlorine before adding any chemicals.
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CONFIRM THE POOL VOLUME
Use the correct pool volume when calculating the required dose.
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ADD PH MINUS
Apply CrystaLux pH Minus exactly as directed on the product label.
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RUN THE FILTRATION
Keep the pump running so the treatment circulates throughout the pool.
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RETEST BEFORE REDOSING
Allow the treatment to circulate for the period stated on the label, then test the pH again.
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CHECK THE CHLORINE
Once the pH is balanced, check whether the chlorine level also requires correction.
Do not mix pH Minus with chlorine or any other pool chemical. Add products separately and store them in their original containers.
Treatment timeline
HOW LONG DOES HIGH PH TAKE TO CORRECT?
High pH should be corrected in controlled stages to avoid lowering the level too far.
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After the first dose
BEGIN CIRCULATION
Run the filtration system so the treatment mixes evenly through the pool.
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After the label-stated waiting period
RETEST THE PH
Check the new reading before adding any further pH Minus.
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Once balanced
RECHECK THE CHLORINE
Confirm the chlorine is within its recommended range before swimming.
BALANCED WATER ALL SEASON
KEEP THE PH FROM RISING AGAIN
Regular testing helps you identify a rising pH before it affects chlorine performance or water clarity.
- Test the pH Regularly Monitor the pH before swimming and after making chemical adjustments. Weekly
- Avoid Overusing pH Plus Always calculate doses from the current test result and pool volume. Weekly
- Check Top-Up Water Your local water supply may naturally have a higher pH. Weekly
- Use Smaller Adjustments Correct the pH gradually and retest between treatments. Daily
- Maintain the Filtration System Good circulation helps distribute treatment evenly. Weekly
CrystaLux
Pool & Hot Tubs
Keep your pool or hot tub clear and inviting by using the right chemicals regularly.
Need help?
Frequently Asked Questions
High pH can be caused by the source water, repeated chemical additions, incorrect dosing or changes in the pool’s overall water balance.
Yes. High pH can reduce chlorine effectiveness and may contribute to mineral deposits and cloudy water.
Wait until the pH and chlorine readings are within the safe range shown on your test kit and product instructions.
No. Never mix pool chemicals. Apply them separately and follow the waiting and circulation instructions on each label.
Check the source water, recent chemical additions and the wider water balance. Persistent problems may require testing total alkalinity as well as pH.
