Increase CH - sources to buy

[newbie2017]

Need to add about 17lb to increase CH. Kindly guide on the best sources to buy.

This is 94% calcium chloride. Not sure of the remaining 6%. Is this ok to use?

Amazon.com : Snow Joe MELT25CCP 25-LB Professional Strength Calcium Chloride Pellets Ice Melter Resealable Bag : Garden & Outdoor

Amazon.com : Snow Joe MELT25CCP 25-LB Professional Strength Calcium Chloride Pellets Ice Melter Resealable Bag : Garden & Outdoor

www.amazon.com

Also found the puritech brand.

Amazon.com : Puri Tech Pool Chemicals Calcium Hardness Increaser Plus for Swimming Pools & Spas Increases Calcium Hardness Levels Prevents Staining on Surfaces… (5lb) : Garden & Outdoor

Amazon.com : Puri Tech Pool Chemicals Calcium Hardness Increaser Plus for Swimming Pools & Spas Increases Calcium Hardness Levels Prevents Staining on Surfaces… (5lb) : Garden & Outdoor

www.amazon.com

Any experience with these products?

Thanks.

 

[jtpipkin]

I use the Puri Tech from amazon - never had any issues

 

[newbie2017]

I use the Puri Tech from amazon - never had any issues

Thanks.