Leisure Time ZHQ Quart Liquid Spa Up P/N: ZHQ Convenient liquid Spa Up offers precise control of the adjustment of the spa or hot tub pH level. Pre-mixed liquid formula arrives ready to use, & does not require mixing or diluting before adding to the spa or hot tub. Fast acting liquid formula is easier to use than common granular spa water balancers. Compatible with bromine, chlorine & biguanide sanitizers. Instructions: Turn ON air blower or filter system. Add 1 oz. directly into spa. Retest water after 30 minutes. Follow steps 1-3 until pH and total alkalinity are in the range of 7.2-7.8 and 80-120 ppm respectively.