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5kg Castle Hot Tubs pH Plus / pH + is a granular balancer used to increase or raise the pH of your hot tub, spa or swimming pool.
pH is a measure of how acidic or how basic water is. The pH range goes from 0 to 14, with 7 being neutral. A pH of less than 7 indicates acidity, a pH of greater than 7 indicates a base. The pH of water is a very important measurement concerning the water quality of your hot tub / spa or swimming pool.
A high pH level in a pool or hot tub water can cause limescale build up, which can damage working parts including pumps, heaters and seals.
I’ve been happy with this product for some time. See no reason to change.
Bought the 5kg tub as it was only slightly more expensive than the 2kg tub so better value
The larger size container is much better valued than what we bought previously