Description Welson PB is a special powdered alkaline neutralizing agent, formulated to modify the acid PH value in the pool. The PH value of pool water should keep at 6.5 to 8.5. When the pool water acid PH value is lower than 6.5, it needs to add Welson PB to balance the PH value. Dosage Add 10 kg per 1000 cubic meters of water, and the pH value will increase by 1 unit. Safety Please wear rubber gloves when using Welson PB, avoid contact with skin, eyes or mucous membranes. If accidentally touch, please use plenty of clean water to wash. If swallowed, please do not induce vomit. Immediately seek medical attention