For increasing the calcium hardness of hot tub water. 
If calcium level is too low, corrosion of metals in system will increase and be harder to clean. If too high, scale may also form in the heater pipes & other circulating parts. Discoloration of surface may take place as well.
 
DIRECTIONS FOR USE:
Check your waters current hardness level & add directed amount. Add directly into water distributing amount evenly & allow jets to run for a few minutes.
Calcium level should be 200-300ppm.
 
Viscount label may be substituted for another name brand label in stock of the same size with the exact same chemical composition.
 
*Caution keep out of reach of children*