💧 Elevate your spa game—because soft water is so last season!
AquaDoc Calcium Hardness Increaser is a professional-grade spa chemical designed to raise calcium levels in hot tubs by 10ppm increments, preventing corrosion, etching, and staining. Easy to use with a simple 4-step process, it ensures balanced, long-lasting water quality and is proudly made in the USA.
R**O
Removes metals from well water
Removes metals from my spa filled with well water within the day!
J**R
Works great and a quality product
This product is excellent for our Jacuzzi J-345. The water tends to get soft in Ohio and this is a perfect power. One cap full will treat the whole tub and bring it up 1-2 color shades on the test sticks.
C**.
Very good Product. The BEST!! Works well. Highly recommended.
This is a very good product, better than other brands that I use to use. This one is very high quality. It works very well. It keeps my water crystal clear. Once I added this to the spa, the water changed in 20 minutes. This works super fast. It is perfect. I will buy again for sure.
D**T
Does the job
A little pricey
K**.
Hot tub product
We purchased this to help balance the water in our spa. We use bromine, not chlorine. The product qas easy to use, was reasonably priced and very effective.
C**X
Exactly what I ordered
Used in a hot tub
J**B
Good product, good price
Good product, good price
D**R
That it works
Hot tub
Trustpilot
3 days ago
2 weeks ago
