SpaChoice 1-Quart 2-Pack Premium Liquid Calcium Hardness Increaser for Hot Tubs – Made in USA

Keep your spa water balanced with SpaChoice Calcium Hardness Liquid

In many spas and hot tubs, the calcium hardness level helps determine how the water interacts with plaster surfaces and with equipment. SpaChoice Calcium Hardness Liquid is designed to raise low hardness levels, offering a responsive option when you want to fine tune your spa balance. The result is water that can feel steadier as it travels through warm temperatures and ongoing filtration.

Why calcium hardness matters

Low calcium hardness can leave spa surfaces more vulnerable to etching and can increase wear on equipment components. Keeping hardness within a typical range helps support the overall integrity of your spa while you enjoy your soak.

Ideal range and key numbers

• The ideal hardness level is 200 to 400 ppm, a range many spas target for balanced conditions.
• One ounce of this product per 500 gallons raises hardness by about 10 ppm, enabling predictable adjustments.

What you get and why users choose it

• Liquid formula offers precise dosing and faster dispersion than granular options.
• Convenient 1 quart per bottle in a 2 pack supports consistent maintenance routines.
• Made in the USA, bringing a domestic manufacturing touch to your spa care kit.

How to use SpaChoice Calcium Hardness Liquid

• Test the water with a calcium hardness test kit to determine your starting level.
• Determine the amount to add using the guideline: about 1 ounce per 500 gallons raises hardness by roughly 10 ppm.
• With the spa equipment turned ON, pour the proper amount into the spa or hot tub.
• Run the filter for 1 to 2 hours to help dispersion and circulation.
• Retest water after about 20 minutes to confirm the adjustment and plan the next step if needed.

Tips for best results

• Packaging may vary by batch, but the product remains the same trusted formulation.
• Because hardness targets vary, consider revisiting water balance after a full filtration cycle.

Note: Use as directed and consult your local spa dealer for guidance if you have questions about your specific system. The information here reflects the product description and common usage guidance for balancing calcium hardness in spa water.