---
product_id: 58616116
title: "Reef Carbonate, 500 ml"
brand: "seachem"
price: "$283855"
currency: COP
in_stock: true
reviews_count: 6
category: "Seachem"
url: https://www.desertcart.co/products/58616116-reef-carbonate-500-ml
store_origin: CO
region: Colombia
---

# Boosts carbonate alkalinity (KH) Blend of carbonate & bicarbonate salts 4,000 meq/L concentrated formula Reef Carbonate, 500 ml

**Brand:** seachem
**Price:** $283855
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate your reef’s vitality with every drop!

## Quick Answers

- **What is this?** Reef Carbonate, 500 ml by seachem
- **How much does it cost?** $283855 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co](https://www.desertcart.co/products/58616116-reef-carbonate-500-ml)

## 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

- • **Simple Application:** Shake, dose, and watch your reef thrive with minimal effort.
- • **Precision KH Control:** Easily tailor your aquarium’s carbonate hardness for optimal reef health.
- • **Trusted by Aquarists:** 4.7-star rating from 490+ reviews proves it delivers on performance.
- • **Balanced Mineral Blend:** Expert mix of carbonate and bicarbonate salts supports stable pH and coral vitality.
- • **Ultra-Concentrated Formula:** High potency 4,000 meq/L ensures fewer doses, more impact.

## Overview

Seachem Reef Carbonate is a 500 ml liquid supplement designed to raise carbonate alkalinity (KH) in freshwater aquariums. Its concentrated formula (4,000 meq/L) combines carbonate and bicarbonate salts to stabilize pH and support coral and aquatic life health. Easy to dose and highly rated by aquarists, it’s a must-have for maintaining vibrant reef ecosystems.

## Description

Product Description Seachem Reef Carbonate 500Ml Directions 1. Measure the KH of the freshwater aquarium. 2. Calculate the amount of Reef Carbonate needed according to the volume of the aquarium and the desired increase in KH. 3. Shake the bottle of Reef Carbonate before each use. 4. Slowly pour the calculated dose into the aquarium. 5. Wait 24 hours before additional testing. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains water treatment See more

Review: Lid was loose - Lid was loose, and white powdery crust was all over the bottle.
Review: It works as advertised.

## Features

- Raises carbonate alkalinity (KH)
- Concentrated (4,000 meq/L)
- Made with a blend of carbonate and bicarbonate salts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002DGM5C |
| Allergen Information | Abalone Free |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 89,078 in Pet Supplies ( See Top 100 in Pet Supplies ) 889 in Aquarium Water Treatments |
| Colour | clear |
| Customer Reviews | 4.7 4.7 out of 5 stars (490) |
| Date First Available | 23 Mar. 2010 |
| Item Form | Liquid |
| Item Weight | 612 g |
| Item model number | 663 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Pet Type | Fish |
| Product Dimensions | 19.3 x 5.33 x 3.81 cm; 612.35 g |
| Quantity | 1 |
| Size | 500 ml (Pack of 1) |
| Specific Uses | Active |
| Volume | 500 Millilitres |

## Product Details

- **Brand:** Seachem
- **Item form:** Liquid
- **Item weight:** 1.35 Pounds
- **Liquid volume:** 500 Millilitres
- **Manufacturer:** Seachem

## Images

![Reef Carbonate, 500 ml - Image 1](https://m.media-amazon.com/images/I/71zSFL5ZOBL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can this be used in a fresh water aquarium for raising KH? Thanks**
A: I would not use this in a freshwater tank. If you are worried about hard/soft water or you want a ph change for a special plant. I suggest you put a baggy of crushed coral in your filter and let that dissolve over time and repeat every few months. However having both a large reef aquarium as well as a smaller freshwater aquarium I have never really had to worry about my KH in my freshwater. In fact I use no chemicals in my freshwater tank as it's so easily self sustaining. Also not trying to sound like a jerk here but it's gonna come out that way I am sure, but if something says REEF or SALTWATER don't put it in freshwater. There are only a few things that can be used in both and this isn't one of them. Ben

**Q: Will I still need to add a pH buffer to supplement this product?**
A: NO---This product will maintain the necessary alkalinity and ph

**Q: My small bio cube has a kh of 7.3 and calcium at 390 i own a bottle of reef carbonate is there something else i should also buy to get this in check?**
A: I use the reef carbonate to increase my KH.. I keep my KH around 10 in my 93 gal mixed reef.   You should try to keep kh above 8 if you have hard corals imo.  Reef carbonate does not contain any calcium so you need another source.   I use ESV b-ionic calcium to maintain my ca level at 450 or higher.  Hope this helps

**Q: What's the difference between this and Seachem Liquid Marine Buffer?**
A: The liquid marine buffer is to keep your ph stable. Weather ho or low. The carbonate is for the coral growth and health. Your ph levels are very important to your corals growth and health as well. Through my experience use both as needed

## Customer Reviews

### ⭐ Lid was loose
*by A***R on 15 March 2021*

Lid was loose, and white powdery crust was all over the bottle.

### ⭐⭐⭐⭐ Review
*by Z***E on 22 June 2016*

It works as advertised.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 30 July 2025*

Works great for bumping up my alkalinity. I just recommend starting with very small doses and increasing them slowly

## Frequently Bought Together

- Seachem Reef Carbonate 500ml
- Seachem Reef Complete 500ml
- Seachem Reef Plus 500ml

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*Product available on Desertcart Colombia*
*Store origin: CO*
*Last updated: 2026-03-05*