---
product_id: 17405424
title: "Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound"
brand: "pool basics"
price: "S$67"
currency: SGD
in_stock: true
category: "Lawn &amp; Patio"
url: https://www.desertcart.sg/products/17405424-pool-basics-2804pb-calcium-hardness-increaser-for-pools-4-pound
store_origin: SG
region: Singapore
---

# Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound

**Brand:** pool basics
**Price:** S$67
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound by pool basics
- **How much does it cost?** S$67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/17405424-pool-basics-2804pb-calcium-hardness-increaser-for-pools-4-pound)

## Best For

- pool basics enthusiasts

## Why This Product

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

## Description

Pool Basics Calcium Hardness is used to raise calcium hardness levels when measures drop below the recommended range of 200-400 ppm. If calcium hardness levels are too low the "soft water" will corrode pool equipment, etch pool plaster and may cause metallic stains. To raise the hardness level by approximately 50ppm is necessary to add 6.25 lbs. per 10,000 gallons of pool water.

## Features

- A low calcium hardness level can cause corrosive water
- Protects plumbing and heater
- Prevents the staining or etching of your pool's surface

## Images

![Pool Basics 2804PB Calcium Hardness Increaser for Pools, 4-Pound - Image 1](http://ecx.images-amazon.com/images/I/31RWRY9wWuL.jpg)

## Available Options

This product comes in different **Size** options.

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**Shop now:** [https://www.desertcart.sg/products/17405424-pool-basics-2804pb-calcium-hardness-increaser-for-pools-4-pound](https://www.desertcart.sg/products/17405424-pool-basics-2804pb-calcium-hardness-increaser-for-pools-4-pound)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-25*