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.
Raise the pH
Restore the water to the recommended range.
Improve Swimmer Comfort
Help reduce irritation caused by unbalanced water.
Protect Pool Equipment
Reduce exposure to overly acidic water.
Restore Water Balance
Create suitable conditions for regular pool maintenance.
PRODUCTS TO CORRECT AND MAINTAIN LOW PH WATER
Raise the pH first, then retest the chlorine and continue normal maintenance.
CrystaLux
CrystaLux pH Plus Pool & Spa pH Increaser 5kg
Sale price£14.95
Regular price£17.95
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 RAISE LOW POOL PH
Raise the pH gradually and retest the water between treatments to avoid increasing it too far.
-
Test the water
Measure both the pH and chlorine before adding any product.
-
CONFIRM THE POOL VOLUME
Check the pool volume so the treatment dose can be calculated accurately.
-
ADD PH PLUS
Apply CrystaLux pH Plus according to the dosage and application instructions on the label.
-
RUN THE FILTRATION
Circulate the water so the treatment can disperse evenly.
-
RETEST THE PH
Wait for the circulation period shown on the product label, then test the water again.
-
CHECK THE CHLORINE
After the pH is balanced, confirm the chlorine is also within the recommended range.
Never mix pH Plus directly with chlorine or other treatments. Handle and store each chemical separately.
Treatment timeline
HOW LONG DOES LOW PH TAKE TO CORRECT?
The pH may require more than one controlled adjustment depending on the starting level and pool volume.
-
After the first dose
CIRCULATE THE WATER
Run the filtration system so the product mixes throughout the pool.
-
After the label-stated waiting period
RETEST THE PH
Check the water before deciding whether another treatment is needed.
-
Once the pH is balanced
CHECK ALL LEVELS
Confirm the chlorine and pH are suitable before allowing anyone to swim.
PROTECT YOUR POOL WATER
KEEP THE PH FROM DROPPING AGAIN
Routine testing helps prevent prolonged exposure to acidic water and avoids large chemical corrections.
- Test the pH Regularly Identify a falling pH before it becomes a larger problem. 2–3× WEEKLY
- Check After Heavy Rain Rain and water replacement can change the pool’s balance. PROMPTLY
- Avoid Excess Acid Treatment Calculate pH Minus carefully and retest before adding more. EVERY TREATMENT
- Make Gradual Corrections Use controlled doses rather than trying to correct the entire reading at once. AS NEEDED
- Investigate Repeated Drops Persistent low pH may indicate that the wider water balance needs testing. IF RECURRING
CrystaLux
Pool & Hot Tubs
Keep your pool or hot tub clear and inviting by using the right chemicals regularly.
Need help?
Frequently Asked Questions
Low pH may be caused by rain, acidic source water, excessive use of pH-reducing products or problems with the wider water balance.
Prolonged exposure to low pH can contribute to corrosion and deterioration of metal components, pipes and equipment.
Do not swim until the pH and chlorine levels have been tested and returned to the recommended range.
The required amount depends on the pool volume and starting pH. Always calculate the dose using the instructions on the product label.
Repeated low readings may be linked to source water, rain, acidic chemical additions or low total alkalinity. Additional water testing may be required.
