The CTX-10 is a granular pH reducer for swimming pools designed to bring high pH levels back into the recommended range of 7.2-7.6. When your pool water reads above 7.6, this product helps restore the balance that keeps disinfection working properly, reduces limescale build-up, and makes swimming more comfortable for everyone in the water.
What does CTX-10 pH reducer actually do?
High pH is one of the most common water chemistry problems in pools. When the reading climbs above 7.6, chlorine and other disinfectants lose a significant portion of their effectiveness – meaning the water may look clear while still being poorly sanitised. On top of that, elevated pH accelerates limescale deposits on pool surfaces, pipework, and equipment, and can cause eye and skin irritation for swimmers.
The CTX-10 granular pH reducer for pools tackles this directly. Its granular form dissolves quickly and evenly, giving you precise, controlled corrections rather than sharp drops. The result is water that sits comfortably in the 7.2-7.6 window – the sweet spot where disinfectants perform at their best and swimmers feel at ease.
Dosage and application guide for CTX-10
Always test your pool water before reaching for the CTX-10. Use a reliable test kit or test strips to confirm the pH is above 7.6 before applying any corrective dose.
Before you apply: verify the pH reading first. Never dose without testing, and always apply with the pool free of swimmers.
The standard dose is 1.5 kg of CTX-10 per 100 m³ of pool water to lower pH by approximately 0.2 units. Pre-dissolve the required amount in a bucket of water, then distribute the solution evenly across the pool surface. For best results, apply at dusk when UV intensity is low and the pool is not in use.
What to expect after applying CTX-10
After dosing, allow at least 6 hours for the product to fully disperse before retesting. Rushing a second measurement can give a misleading reading and lead to over-correction – pushing the pH too low, which creates a different set of problems.
Once the pH settles into the 7.2-7.6 range, you should notice that your disinfectant works more efficiently, the water feels cleaner and more comfortable to swim in, and limescale formation slows down. If the pH is still above 7.6 after the first dose, repeat the process – calculating the dose against your pool volume and the gap still to close.
After applying: retest before adding more product. Successive doses without testing in between risk dropping the pH below 7.2, which is just as problematic as it being too high.
Why buy CTX-10 from Pools&More?
As an Official CTX Stockist, Pools&More carries the full CTX water treatment range backed by genuine pool care expertise.
Expert support: not sure how much CTX-10 your pool needs? The Pools&More team can help you work out the right dose before you buy.
- Official CTX Stockist
- Dosage help
- Pre- and post-purchase support
Frequently Asked Questions about CTX-10 pH reducer for Pools
What is CTX-10 used for in a swimming pool?
The CTX-10 granular pH reducer for pools is used to lower pool water pH when it rises above 7.6. Bringing the pH back into the recommended 7.2-7.6 range helps restore disinfection efficiency and keeps the water more comfortable for swimmers.
When should I add CTX-10 to my pool?
Apply CTX-10 only after testing your water and confirming that the pH is above 7.6. Always dose with no swimmers in the pool and allow enough time for the product to disperse before using the pool again.
How much CTX-10 do I need per m³ of pool water?
Use 1.5kg of CTX-10 per 100m³ of water to reduce the pH by approximately 0.2 units. Scale the dose according to your pool volume and the correction required.
How do I apply CTX-10 granular pH reducer?
Pre-dissolve the measured dose in a bucket of pool water, then pour the solution evenly around the pool perimeter or across the surface. Wait at least 6 hours before retesting and avoid adding more product until you have a fresh, accurate reading.
Why does high pool pH cause problems?
Above 7.6, chlorine efficiency drops, limescale deposits can form more easily on surfaces and equipment, and swimmers may experience eye or skin discomfort. Keeping pH in the 7.2-7.6 range is essential for balanced, clear and comfortable pool water.
| Weight | 7 kg |
|---|---|
| Peso | 7 Kg; |
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