---
product_id: 393678672
title: "Seachem Reef Kalkwasser 250gram"
brand: "seachem"
price: "1784128₫"
currency: VND
in_stock: true
url: https://www.desertcart.vn/products/393678672-seachem-reef-kalkwasser-250gram
store_origin: VN
region: Vietnam
---

# Perfect for top-off water calcium enrichment Boosts pH without altering alkalinity 250g ultra-pure calcium hydroxide Seachem Reef Kalkwasser 250gram

**Brand:** seachem
**Price:** 1784128₫
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate your reef’s vitality with precision and purity!

## Quick Answers

- **What is this?** Seachem Reef Kalkwasser 250gram by seachem
- **How much does it cost?** 1784128₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/393678672-seachem-reef-kalkwasser-250gram)

## 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

- • **pH Power:** Raises pH levels seamlessly without compromising carbonate balance
- • **Pure Performance:** Ultra-pure calcium hydroxide ensures optimal reef health
- • **Aquarium Friendly:** Safe for all aquatic life stages, supporting vibrant reef ecosystems
- • **Top-Off Essential:** Specifically designed to enhance calcium in top-off water
- • **Compact & Convenient:** 250g size fits perfectly into your reef maintenance routine

## Overview

Seachem Reef Kalkwasser is a premium 250g calcium hydroxide powder designed to increase calcium levels in aquarium top-off water. It effectively raises pH without impacting carbonate alkalinity, making it ideal for maintaining stable, healthy reef environments suitable for all aquatic life stages.

## 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.

## 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 |
|---------------|-------|
| Pet Type | Fish and Aquatic |
| Product Dimensions | 1.24 x 6.1 x 0.61 cm; 295 g |
| Item model number | 393 |
| Pet Life Stage | All Life Stages |
| Item Form | Liquid |
| Allergen Information | Yam Free |
| Color | clear |
| Size | 250 GRAM |
| Number of Items | 1 |
| Quantity | 1 |
| Specific Uses | habitat |
| batteries required | No |
| Batteries Included | No |
| External Testing Certification | Não aplicável |
| Item Weight | 295 g |

## Product Details

- **Brand:** Seachem
- **Liquid volume:** 4 Liters
- **Item weight:** 0.3 Kilograms
- **Item form:** Liquid
- **Manufacturer:** Seachem

## Images

![Seachem Reef Kalkwasser 250gram - Image 1](https://m.media-amazon.com/images/I/71tGcn6+6zL.jpg)
![Seachem Reef Kalkwasser 250gram - Image 2](https://m.media-amazon.com/images/I/81+T-yQJcNL.jpg)
![Seachem Reef Kalkwasser 250gram - Image 3](https://m.media-amazon.com/images/I/91pqhrcjqFL.jpg)
![Seachem Reef Kalkwasser 250gram - Image 4](https://m.media-amazon.com/images/I/31-tMVC16GL.jpg)

## Available Options

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

## Questions & Answers

**Q: How do you kill aiptaisa with this?**
A: Simply pour some kalkwasser with a pipette on top o it. Beware some people have reported mixed results, with aiptaisa splits and reproduction after kalkwasser. You can also kill aiptaisa by hitting it with the same gel glue you use for your corals/plugs.

**Q: Ok so I much of the solution would I use as a daily dose on a 26 gallon aquarium? 5 mL like the liquid?**
A: Read the dosage requirements on the back of the product container. I have a 100 gallon Reef tank with tropical fish corals and anemones. I only use two table spoons to raise my calcium level in one day. I do this daily or every other day until i reach my 400 ppm color match on the calcium chart. You need to find out what your calcium level is before using this product or you will kill your fish.

**Q: Is it 1 teaspoon or 2 per gallon? I am confused.**
A: Kalkwasser's max saturation is 2 teaspoons per gallon. Using more means it's essentially wasted. It is recommended that you start at 1 teaspoon (or less) per gallon and test your water, to make sure you don't create huge spikes in pH and alkalinity, or excess in calcium. Test as needed and increase if appropriate.

**Q: What’s the difference in this and reef complete?**
A: Kalkwasser ("limewater" in German) is a concentrated solution of calcium hydroxide that has a high pH and will let you supplement calcium and alkalinity and maintain a high pH in your reef aquarium. Reef complete is Calcium Chloride, together with Magnesium and Strontium, that will allow you to maintain adequate levels of these, but you still may need to add carbonate alkalinity (Reef builder) separately. I use kalkwasser through my ATO and supplement magnesium separately.

## Frequently Bought Together

- Seachem Reef Kalkwasser 250gram
- Polyp Lab Nano Reef-Roids Coral Food - 37g
- All Seas Marine 050-28 SLB Splmt Replenisher 1/2# Blk

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vn/products/393678672-seachem-reef-kalkwasser-250gram](https://www.desertcart.vn/products/393678672-seachem-reef-kalkwasser-250gram)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-24*