---
product_id: 306144408
title: "Perma-Cast SpaPure Calcium Hardness Increaser 16oz"
brand: "spapure"
price: "₩69654"
currency: KRW
in_stock: true
reviews_count: 5
category: "Spa Pure"
url: https://www.desertcart.kr/products/306144408-perma-cast-spapure-calcium-hardness-increaser-16oz
store_origin: KR
region: South Korea
---

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

**Brand:** spapure
**Price:** ₩69654
**Availability:** ✅ In Stock

## Summary

> 💦 Elevate your spa game—because soft water is so last season!

## Quick Answers

- **What is this?** Perma-Cast SpaPure Calcium Hardness Increaser 16oz by spapure
- **How much does it cost?** ₩69654 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/306144408-perma-cast-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

- • **Granular Power:** Easy-to-use granular formula ensures quick and even distribution in any spa or hot tub.
- • **Corrosion Defense:** Stops and prevents damaging corrosion on spa surfaces for lasting luxury.
- • **Trusted by Thousands:** Highly rated with 4.7 stars from over 580 spa enthusiasts who swear by its effectiveness.
- • **Universal Compatibility:** Works seamlessly with chlorine, bromine, mineral sanitizers, and biguanide systems.
- • **Optimal Spa Water Balance:** Precisely boosts calcium hardness to protect your spa’s integrity.

## Overview

Perma-Cast SpaPure Calcium Hardness Increaser (16oz) is a granular formula designed to safely raise calcium levels in all spa and hot tub waters. It prevents corrosion, extends the life of your spa surfaces, and is compatible with all major sanitizer systems, ensuring balanced, crystal-clear water and a premium spa experience.

## Description

Perma-Cast PC3008A 3" Deck Aluminum Anchor Channel Mount Set PC-3008-A

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: Increases Water Hardness. - 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.

## 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 |
| Brand | SpaPure |
| Brand Name | SpaPure |
| Customer Reviews | 4.7 out of 5 stars 586 Reviews |
| Item Form | Granular |
| Item form | Granular |
| Manufacturer | Perma-Cast |
| Manufacturer Part Number | SPA2729CS20B6 |
| Model Number | SPA2729CS20B6 |
| Product Benefits | Corrosion |
| Product benefits | Corrosion |
| UPC | 025551710581 025551721402 |
| Unit Count | 16.0 Ounce |
| Unit count | 16.0 Ounce |

## Product Details

- **Brand:** SpaPure
- **Item form:** Granular
- **Item weight:** 16 Ounces
- **Product benefits:** Corrosion
- **UPC:** 025551710581 025551721402

## Images

![Perma-Cast SpaPure Calcium Hardness Increaser 16oz - Image 1](https://m.media-amazon.com/images/I/71YukXSWq7L.jpg)
![Perma-Cast SpaPure Calcium Hardness Increaser 16oz - Image 2](https://m.media-amazon.com/images/I/81m9VcELisL.jpg)

## Customer Reviews

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

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

### ⭐⭐⭐⭐ Easy to use for small pool or spa
*by P***G on 19 September 2024*

Not large enough bottle for use in larger pools or swim spas

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**Shop now:** [https://www.desertcart.kr/products/306144408-perma-cast-spapure-calcium-hardness-increaser-16oz](https://www.desertcart.kr/products/306144408-perma-cast-spapure-calcium-hardness-increaser-16oz)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-09-15*