This product is used to decrease the pH of your pool water. Add this product if your test kit result indicates that the pH is too high. Smaller Size of pH Reducer. Test the pH of your water on a regular basis.
eBay
PH Minus is also used to decrease the Total Akalinity of your Spa,Hot Tub or pool water. Simply Test Your Spa/Pool water and Follow the instructions on the back of the tub to decrease your PH correctly.
eBay
750g pH Minus - Swimming Pool & Spa Chemicals. This product is used to decrease the pH of your pool water. Add this product if your test kit result indicates that the pH is too high. Above 7.8 the efficiency of the chlorine will be reduced.
eBay
If you are unable to maintain an appropriate pH level in your spa, the most likely cause is that the the alkalinity level is too low. Always correct the the alkalinity balance before you attempt to balance the pH.
eBay
5Kg Ph minus & Alkalinity Reducer for Hot Tub Spa & Swimming Pools, Ph minus Decreases Your Water Ph Levels. Quick Dissolving - No need to wait around for this granules to take effect! As soon as it's added to your water, it will start working to reduce the pH levels and alkalinity.
eBay
Full instructions are on the label. When using this product to reduce total alkalinity (TA) add your dose to the pool without the filter running so it settles at the bottom of the pool, then restart the filter after one to two hours and retest after 24 hours.
eBay
Relax pH Minus will reduce pH of water in swimming pools and spa hot tubs. -If you test kit reading is indicated a pH of more than 7.6 add pH minus at the rate of 10g per 1000 litres(220 gallons) of pool and spa water.
eBay
1kg pH Plus (pH Increaser). Chlorine Granules Multifunction Chlorine Tablets for Swimming Pool Spa Hot Tub. Form: Granules / Tablets. 1kg Chlorine Granules. 5kg Chlorine Granules. May intensify fire; oxidizer.
eBay