---
product_id: 277934868
title: "Reef Carbonate, 500 ml"
brand: "seachem"
price: "HK$266"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/277934868-reef-carbonate-500-ml
store_origin: HK
region: Hong Kong
---

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

**Brand:** seachem
**Price:** HK$266
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate Your Reef’s Chemistry, Because Your Aquarium Deserves the Best

## Quick Answers

- **What is this?** Reef Carbonate, 500 ml by seachem
- **How much does it cost?** HK$266 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/277934868-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

- • **Easy Liquid Application:** Convenient 500 ml liquid form for precise and mess-free dosing
- • **Universal Compatibility:** Safe and effective for all fish life stages, ensuring seamless integration
- • **Balanced Chemistry Blend:** Expertly crafted mix of carbonate and bicarbonate salts for stable pH
- • **Ultra-Concentrated Formula:** Packed with 4,000 meq/L for maximum efficiency and minimal dosing
- • **Boost Your Reef’s Backbone:** Elevates carbonate alkalinity for a thriving aquatic ecosystem

## Overview

SeachemReef Carbonate is a 500 ml liquid supplement designed to raise carbonate alkalinity (KH) in marine aquariums. With a potent concentration of 4,000 meq/L, it features a balanced blend of carbonate and bicarbonate salts, ensuring stable pH and optimal water chemistry for all fish life stages. This abalone-free formula supports healthy reef environments with easy, precise dosing.

## Description

SeachemReef Carbonate, 500 ml

## Features

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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Pet Type | Fish |
| Product Dimensions | 19.3 x 5.33 x 3.81 cm; 612.35 g |
| Item model number | 663 |
| Pet Life Stage | All Life Stages |
| Item Form | Liquid |
| Allergen Information | Abalone Free |
| Size | 500 ml |
| Volume | 500 Milliliters |
| Number of Items | 1 |
| Quantity | 1 |
| batteries required | No |
| Batteries Included | No |
| Item Weight | 612 g |

## Product Details

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

## Images

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

## 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

## Frequently Bought Together

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

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-08*