HASA Hi-Temp
Hardness Increaser

HASA's Hi-Temp Spa Hardness Increaser raises calcium hardness levels to protect spa and hot tub surfaces and equipment. Especially in areas where source water is naturally soft. 

Key Features & Benefits:

• Raises Calcium Harndess: Used to railse the level of calcium in order to increase hardness of water in spas and hot tubs. 

• Protects Surfaces & Equipment: Helps prevent etching and corroding of spa dn hot tub surfaces and equipment.

• Ideal for Soft Water Areas: Especially helpful in areas where source water is naturally soft.

Dosing Instructions:

Add 1.5 oz of Hi-Temp Spa Hardness Increaser per 500 gallons of spa or hot tub water to raise calcium hardness by approximately 10 ppm. Calcium hardness should be kept between 175–275 ppm. Refer to label directions for complete dosing information.