AquaDoc | Spa Calcium Hardness Increaser Hot Tub Owners Rely on, Calcium Increaser Spa Hardness Increaser & Calcium Booster for Hot Tubs, Spa Calcium Increaser & Hot Tub Water Hardener Spa Chemicals

AquaDoc's Calcium Hardness Increaser is a must-have for any hot tub or spa owner who wants to ensure their water is properly balanced and free from corrosion, etching, and staining.

Our Professional Grade Hot Tub Calcium increaser raises your water's hardness level by 10ppm increments or more, making it easy to maintain the proper balance of calcium in your hot tub or spa.

With AquaDoc's Calcium Booster, you can avoid costly repairs and maintenance caused by soft water, and enjoy a longer-lasting and more enjoyable hot tub experience.

Plus, our product is made in the USA and easy to use - simply check your calcium levels, add 1 ounce of AquaDoc's Calcium increaser while equipment is on, run the filter for 1-2 hours, wait 20 minutes, and then retest the water.

Don't let unbalanced calcium levels ruin your hot tub experience - get AquaDoc's Calcium Hardness Increaser today!