---
product_id: 393005187
title: "1-2804B Calcium Increaser for Swimming Pools, 4-Pound"
brand: "pool mate"
price: "$U36702"
currency: UYU
in_stock: true
reviews_count: 5
category: "Pool Mate"
url: https://www.desertcart.uy/products/393005187-1-2804b-calcium-increaser-for-swimming-pools-4-pound
store_origin: UY
region: Uruguay
---

# Rapid hardness boost Precise ppm control Prevents corrosion & etching 1-2804B Calcium Increaser for Swimming Pools, 4-Pound

**Brand:** pool mate
**Price:** $U36702
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your pool game—because soft water is so last season!

## Quick Answers

- **What is this?** 1-2804B Calcium Increaser for Swimming Pools, 4-Pound by pool mate
- **How much does it cost?** $U36702 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/393005187-1-2804b-calcium-increaser-for-swimming-pools-4-pound)

## Best For

- pool mate enthusiasts

## Why This Product

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

## Key Features

- • **Precision Dosing:** Easily adjust calcium hardness with exact measurements—8 oz raises 10 ppm per 5,000 gallons.
- • **Trusted by Thousands:** Highly rated by 1,386 pool pros who rely on Pool Mate for season-long water perfection.
- • **Instant Calcium Power:** Rapidly elevates pool hardness to the ideal 200-400 ppm range for crystal-clear water.
- • **Effortless Application:** Granular formula dissolves quickly and disperses evenly with your pool’s circulation system.
- • **Protect Your Investment:** Prevents costly plaster etching and metallic stains by maintaining balanced calcium levels.

## Overview

Pool Mate 1-2804B Calcium Increaser is a fast-acting granular calcium chloride formula designed to raise and maintain optimal calcium hardness levels (200-400 ppm) in swimming pools. It protects pool surfaces from corrosion and etching, ensuring long-lasting water clarity and surface integrity. Easy to dose and dissolve, it’s a must-have for any pool owner aiming for pristine, balanced water chemistry.

## Description

Pool Mate Calcium Plus 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 etch pool plaster and may cause metallic stains. This is a dry granular product that increases the total hardness in pool water to the recommended range. Directions for use: Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools - 200-300 ppm. Tile and Exposed Aggregate Pools - 200-400 ppm. Marcite, Fiberglass or Painted Pools - 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the guide below. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period. For 5,000 gallon pool: to increase by 10 ppm add 7.2 oz., to increase by 20 ppm add 14.4 oz., to increase by 30 ppm add 1.35 lbs., to increase by 40 ppm add 1.8 lbs., to increase by 60 ppm add 2.7 lbs., to increase by 80 ppm add 3.6 lbs., to increase by 100 ppm add 4.5 lbs. For 10,000 gallon pool: to increase by 10 ppm add 14.4 oz., to increase by 20 ppm add 1.8 lbs., to increase by 30 ppm add 2.7 lbs., to increase by 40 ppm add 3.6 lbs., to increase by 60 ppm add 5.4 lbs., to increase by 80 ppm add 7.2 lbs., to increase by 100 ppm add 9 lbs. For 20,000 gallon pool: to increase by 10 ppm add 1.8 lbs., to increase by 20 ppm add 3.6 lbs., to increase by 30 ppm add 5.4 lbs., to increase by 40 ppm add 7.2 lbs., to increase by 60 ppm add 10.8 lbs., to increase by 80 ppm add 14.4 lbs., to increase by 100 ppm add 18 lbs. 100% Calcium Chloride Compound.

Review: Good stuff. Works well with my salt water pool and helps maintain the right chemical balance. Easy to use. Will be buying again next pool season!
Review: This Pool Mate product raises the calcium hardness in pool water. It dissolves easily, rapidly raises the hardness and is very reasonably priced when purchased in the 25 pound size.

## Features

- Calcium chloride for pools
- Rapidly increases total hardness
- Helps prevent corrosion or etching of pools
- Ideal calcium hardness range 200 - 400 ppm
- 8 ounces raises calcium hardness level 10 ppm per 5,000 gallons of water
- Prevents the staining or etching of your pool's surface
- Low calcium hardness level can cause water issues

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07B7ZBCXQ |
| Brand | Pool Mate |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,386) |
| Date First Available | 7 March 2018 |
| Included Components | Pool Calcium Increaser |
| Is Discontinued By Manufacturer | No |
| Item model number | 1-2825B |
| Manufacturer | Pool Mate |
| Number of Items | 1 |
| Product Dimensions | 30.48 x 25.4 x 30.48 cm; 11.34 kg |
| Size | 25-Pounds (Bag) |

## Product Details

- **Brand:** Pool Mate
- **Item form:** Granular
- **Item weight:** 11.34 kg
- **Product benefits:** Prevents Stains
- **UPC:** 676215282588

## Images

![1-2804B Calcium Increaser for Swimming Pools, 4-Pound - Image 1](https://m.media-amazon.com/images/I/71FDXA6r7iL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***P on 5 November 2025*

Good stuff. Works well with my salt water pool and helps maintain the right chemical balance. Easy to use. Will be buying again next pool season!

### ⭐⭐⭐⭐⭐ Review
*by F***I on 28 July 2025*

This Pool Mate product raises the calcium hardness in pool water. It dissolves easily, rapidly raises the hardness and is very reasonably priced when purchased in the 25 pound size.

### ⭐⭐⭐⭐⭐ Review
*by W***M on 7 December 2025*

Repeat customer of this product. No complaints. Already does the job at the best price point

## Frequently Bought Together

- Pool Mate 1-2825B Calcium Hardness Increaser for Pools, 25-Pounds
- Pool Mate 1-2607B Pool Stabilizer for Pools, 7-Pounds
- Clorox® Pool&Spa™ Swimming Pool pH Down, Lowers pH, Protects Against Eye and Skin Irritation, 5LB (Pack of 1)

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-03-10*