---
product_id: 81241366
title: "SpaPure Calcium Hardness Increaser 16oz"
brand: "spapure"
price: "€ 26.77"
currency: EUR
in_stock: true
reviews_count: 8
category: "Spa Pure"
url: https://www.desertcart.nl/products/81241366-spapure-calcium-hardness-increaser-16oz
store_origin: NL
region: Netherlands
---

# Safely raises calcium hardness Compatible with all sanitizer systems Prevents spa surface corrosion SpaPure Calcium Hardness Increaser 16oz

**Brand:** spapure
**Price:** € 26.77
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your spa game—because soft water shouldn’t mean soft surfaces!

## Quick Answers

- **What is this?** SpaPure Calcium Hardness Increaser 16oz by spapure
- **How much does it cost?** € 26.77 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/81241366-spapure-calcium-hardness-increaser-16oz)

## Best For

- spapure enthusiasts

## Why This Product

- Trusted spapure brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Thousands:** Highly rated with 4.7 stars from over 650 spa enthusiasts.
- • **Effortless Maintenance:** Granular formula makes dosing simple and precise.
- • **Crystal Clear Spa Water:** Maintain perfect calcium balance for sparkling clarity.
- • **Universal Compatibility:** Works seamlessly with bromine, chlorine, mineral, and biguanide systems.
- • **Ultimate Surface Protection:** Stops corrosion to keep your spa looking pristine.

## Overview

SpaPure Calcium Hardness Increaser 16oz is a granular formula designed to safely boost calcium levels in all spa and hot tub waters. It prevents corrosion of spa surfaces and is compatible with all major sanitizer systems including bromine, chlorine, mineral sanitizers, and biguanide. Trusted by thousands with a 4.7-star rating, it ensures your spa stays crystal clear and protected.

## Description

The SpaPure Hardness Increaser is a granular product that is designed to safely raise the calcium hardness levels in your spa water. Regular use of this product will stop and prevent the corrosion of your spa's surfaces. This product is compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide.

Review: Works as described. - Works good in an 8 x 8 spa. I didn't realize my water was actually too soft for a spa, but this does the trick.
Review: Good product - Great amount for the price.

## Features

- Safely raise the calcium hardness levels in your spa water
- Stop and prevent the corrosion of your spa's surfaces
- Compatible with all systems including bromine, chlorine, mineral sanitizers, and biguanide
- For Use in All Spas and Hottubs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0045W037Y |
| Best Sellers Rank | #21,107 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #64 in Swimming Pool Balancers |
| Brand | SpaPure |
| Customer Reviews | 4.7 4.7 out of 5 stars (652) |
| Is Discontinued By Manufacturer | No |
| Item Form | Granular |
| Item Weight | 1 pounds |
| Item model number | SPA2729CS20B6 |
| Manufacturer | Haviland |
| Number of Items | 1 |
| Package Dimensions | 10.28 x 2.44 x 2.4 inches |
| Product Benefits | Corrosion |
| UPC | 025551710581 025551721402 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** SpaPure
- **Item Form:** Granular
- **Item Weight:** 16 Ounces
- **Product Benefits:** Corrosion
- **UPC:** 025551710581 025551721402

## Images

![SpaPure Calcium Hardness Increaser 16oz - Image 1](https://m.media-amazon.com/images/I/416QIhIb+cL.jpg)
![SpaPure Calcium Hardness Increaser 16oz - Image 2](https://m.media-amazon.com/images/I/41BLuS7mkyL.jpg)
![SpaPure Calcium Hardness Increaser 16oz - Image 3](https://m.media-amazon.com/images/I/41FKCtMGX-L.jpg)
![SpaPure Calcium Hardness Increaser 16oz - Image 4](https://m.media-amazon.com/images/I/71YukXSWq7L.jpg)
![SpaPure Calcium Hardness Increaser 16oz - Image 5](https://m.media-amazon.com/images/I/81m9VcELisL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as described.
*by M***H on October 7, 2025*

Works good in an 8 x 8 spa. I didn't realize my water was actually too soft for a spa, but this does the trick.

### ⭐⭐⭐⭐⭐ Good product
*by A***S on October 22, 2024*

Great amount for the price.

### ⭐⭐⭐⭐⭐ Increases Water Hardness.
*by A***K on June 23, 2025*

Increases hardness of water. I should probably buy a bigger size container or stock up on these. I probably needed 2/3 of the container to get the water where I wanted it for my tub. But it does what it is supposed to.

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---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-21*