---
product_id: 394011482
title: "Reef Kalkwasser, 2 kg / 4.4 lbs"
brand: "seachem"
price: "B/.409"
currency: PAB
in_stock: true
reviews_count: 6
category: "Seachem"
url: https://www.desertcart.com.pa/products/394011482-reef-kalkwasser-2-kg-4-4-lbs
store_origin: PA
region: Panama
---

# Maintains natural seawater calcium levels Raises pH without altering alkalinity 99.9% pure calcium hydroxide Reef Kalkwasser, 2 kg / 4.4 lbs

**Brand:** seachem
**Price:** B/.409
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your reef game—pure calcium, perfect pH, professional results!

## Quick Answers

- **What is this?** Reef Kalkwasser, 2 kg / 4.4 lbs by seachem
- **How much does it cost?** B/.409 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/394011482-reef-kalkwasser-2-kg-4-4-lbs)

## Best For

- seachem enthusiasts

## Why This Product

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

## Key Features

- • **Economical & Efficient:** A 2 kg pack delivers long-lasting, high-solubility kalkwasser solution for consistent reef vitality.
- • **Ultra-Pure Calcium Boost:** Ensure your reef’s calcium stays at pristine, natural seawater levels with 99.9% pure calcium hydroxide.
- • **Pro-Level Reef Maintenance:** Ideal for managers who demand precision—maintain ionic balance with minimal fuss and maximum results.
- • **Complement Your Reef Regimen:** Seamlessly pairs with Reef Advantage Calcium™ and Reef Builder™ for a complete, professional-grade reef care system.
- • **pH Perfected, Alkalinity Protected:** Elevate your aquarium’s pH safely without disrupting carbonate alkalinity balance—critical for coral health.

## Overview

Seachem Reef Kalkwasser is a premium 2 kg powder of ultra-pure calcium hydroxide designed to maintain natural seawater calcium levels and increase pH without affecting carbonate alkalinity. Perfect for reef aquarists seeking precise, economical, and effective calcium supplementation to support vibrant coral growth and stable water chemistry.

## Description

Reef Kalkwasser™ is a pure calcium hydroxide with unsurpassed purity and solubility characteristics. Calcium hydroxide is used to prepare limewater (kalkwasser) solutions that will maintain calcium concentrations at natural seawater levels. Kalkwasser solutions maintain calcium directly and carbonate alkalinity indirectly. However, its capacity to perform these functions is dependent on evaporation rate and CO2 concentration. If these two factors are insufficient you can provide additional calcium with Reef Advantage Calcium™, Reef Complete™, or Reef Calcium™, and carbonate alkalinity with Reef Builder™ or Reef Carbonate™ (do not mix these directly with a kalkwasser solution). While Reef Kalkwasser™ is a high purity and economical limewater mix, the beginner, or someone with not as much time to devote to their system, may prefer to use other less involved methods for maintaining proper ionic concentration levels.

Review: Broken box - Broken container. All power everywhere, I have to clean up
Review: Corals seem happy, this will last a while.

## Features

- Very pure calcium hydroxide
- Ideal for increasing calcium in top-off water
- Increases pH with no impact on carbonate alkalinity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002A5WPG |
| Allergen Information | Yam Free |
| Batteries Included | No |
| Best Sellers Rank | #51,363 in Pet Supplies ( See Top 100 in Pet Supplies ) #458 in Fish Medication & Health Supplies |
| Color | white |
| Customer Reviews | 4.3 4.3 out of 5 stars (79) |
| Date First Available | 9 August 2012 |
| Item Form | Powder |
| Item Weight | 2.27 Kilograms |
| Item model number | 399 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Product Dimensions | 20.32 x 20.32 x 19.05 cm; 2.27 kg |
| Quantity | 1 |
| Size | 2 kg/ 4.4 lb |
| Specific Uses | Active |
| batteries required | No |

## Product Details

- **Brand:** Seachem
- **Item form:** Powder
- **Item weight:** 2.27 kg
- **Liquid volume:** 4 Liters
- **Manufacturer:** Seachem

## Images

![Reef Kalkwasser, 2 kg / 4.4 lbs - Image 1](https://m.media-amazon.com/images/I/61xyHTfQmFL.jpg)

## Customer Reviews

### ⭐ Broken box
*by J***O on 20 August 2023*

Broken container. All power everywhere, I have to clean up

### ⭐⭐⭐⭐⭐ Review
*by C***E on 19 August 2022*

Corals seem happy, this will last a while.

### ⭐⭐⭐⭐⭐ Review
*by R***A on 25 November 2025*

This stuff makes your reef rock! I always run this in my top off water. If your having trouble with your LPS, they love this stuff and grow like weeds when you run it.

## Frequently Bought Together

- Reef Kalkwasser, 2 kg / 4.4 lbs
- Instant Ocean Reef Crystals Reef Salt, Formulated Specifically For Reef Fish Tank Aquariums
- ESV B-Ionic Calcium Buffer System, 2-part Calcium and Alkalinity Maintenance Kit for Salt Water Coral Reef Aquarium, 2-Gallon

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**Shop now:** [https://www.desertcart.com.pa/products/394011482-reef-kalkwasser-2-kg-4-4-lbs](https://www.desertcart.com.pa/products/394011482-reef-kalkwasser-2-kg-4-4-lbs)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-02-10*