Natural Chemistry
Natural Chemistry Spa Calcium Increaser
Best solution for hot tub owners needing to balance water hardness.
Maintain optimal spa water balance with Natural Chemistry Spa Calcium Increaser. This granular formula is designed to raise calcium hardness levels, crucial for preventing corrosive water that can damage your spa's surface and equipment. Ideal calcium hardness should range between 150-250 ppm. By using this 1.83 lb package, you can effectively reduce cloudiness caused by low calcium and protect your spa investment, ensuring a healthier and more enjoyable hot tub experience.
$18.95
Owner Satisfaction
4.6
/ 5
Category Rank
118
/ 1283
#118 in Pool Cleaners & Chemicals
Price vs Category Average
-72%
Below average
Product Form
Granular
/ Granular
Who it's for
- Spa owners looking to prevent heater and jet corrosion
- Maintenance beginners wanting a quick and easy application process
- Pool owners seeking stable water chemistry and sanitizer efficiency
Who should skip it
- Budget-conscious shoppers looking for the lowest-priced generic chemicals
- Owners with naturally hard water prone to scale buildup
- Users wanting to avoid extra brushing or filtration steps
Performance breakdown
Solubility speed
Granular formula dissolves rapidly to prevent residue on spa surfaces.
Equipment protection
Effectively prevents corrosive water damage to heaters and internal plumbing.
Water clarity impact
Quickly clears up cloudiness caused by mineral imbalances in hot tubs.
Application ease
Simple dosing process makes routine water maintenance stress-free for owners.
Surface compatibility
Safe for use across vinyl, fiberglass, and gunite spa finishes.
Chemical stability
Reliable calcium chloride concentration ensures predictable adjustments to water hardness.
Key Specs
Product Form
Granular
Active Ingredient
Calcium Chloride
Net Contents
1 lb (16 oz)
Purpose
Increases Calcium Hardness
Application
Raises calcium hardness in spa and hot tub water
Manufacturer Number
04205
Country of Origin
United States
Pool Surface Compatible
Vinyl Liner, Fiberglass, Gunite
Features
- Raises calcium hardness levels
- Protects spa surfaces and equipment
- Reduces cloudy water
- Easy-to-use granular formula
- Essential for water balance
- Designed for spas and hot tubs
What customers say
Consumers consistently praise the Natural Chemistry Spa Calcium Increaser for its exceptional ease of use and reliable effectiveness. The primary insight is how quickly and cleanly the product dissolves, preventing the common issue of cloudiness or undissolved residue in the spa water. Users find it highly efficient at stabilizing calcium hardness, which is crucial for equipment longevity. While recognized as a premium maintenance solution, its dependable performance justifies the investment, making it a trusted choice for routine spa care.
Know before you buy
Low calcium levels can make your spa water corrosive, which may damage your heater, pump, and interior surfaces over time. Maintaining a proper balance protects your equipment and extends the life of your spa.
You should aim to keep your calcium hardness levels between 150 and 250 ppm. Testing your water regularly will help you determine if you need to add this product to reach that range.
Yes, this formula is fully compatible with saltwater spa systems. It effectively raises calcium levels without interfering with your salt cell performance.
Yes, low calcium hardness is a common cause of cloudy water. By bringing your levels back into the recommended range, you can often eliminate that haze and improve water clarity.
Yes, this granular formula is safe to use with vinyl liner, fiberglass, and gunite spa surfaces. It is designed to protect these materials from the damaging effects of soft, corrosive water.
For best results, dissolve the required amount of granules in a bucket of spa water before pouring the mixture evenly around the perimeter of your spa while the pump is running. Always refer to the product label for specific dosage instructions based on your spa's volume.
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$19