20KG PH+ Plus *GRADE 1* Hot Tub Spa Tubs Swimming Pool Soda Ash PH + Increaser
20KG HappyHotTubs PH Increaser ( PH+). PH Plus is also used to increase the Total Alkalinity of your Spa, Hot Tub or pool water. Why Happy Hot Tubs?. We have over 30 Years experience in Hot Tubs and Pools!