--- product_id: 58616116 title: "Reef Carbonate, 500 ml" brand: "seachem" price: "Β£20.96" currency: GBP in_stock: true reviews_count: 1 category: "Seachem" url: https://www.desertcart.co.uk/products/58616116-reef-carbonate-500-ml store_origin: GB region: United Kingdom --- # Boosts carbonate alkalinity (KH) Blend of carbonate & bicarbonate salts 4,000 meq/L concentrated formula Reef Carbonate, 500 ml **Brand:** seachem **Price:** Β£20.96 **Availability:** βœ… In Stock ## Summary > 🌊 Elevate your reef’s vitality with precision carbonate power! ## Quick Answers - **What is this?** Reef Carbonate, 500 ml by seachem - **How much does it cost?** Β£20.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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 - β€’ **Trusted Reef Care:** Seachem quality with 4.7-star rating from 496 reef enthusiasts - β€’ **Balanced Mineral Blend:** Optimized mix of carbonate and bicarbonate salts for stable water chemistry - β€’ **Simple, Measurable Dosing:** Clear instructions ensure perfect dosing every time - β€’ **Precision Alkalinity Boost:** Easily raise KH levels for a thriving reef environment - β€’ **Ultra-Concentrated Formula:** High potency at 4,000 meq/L means less product, more impact ## Overview Seachem Reef Carbonate is a 500 ml liquid aquarium conditioner designed to raise carbonate alkalinity (KH) in reef tanks. Its ultra-concentrated formula (4,000 meq/L) combines carbonate and bicarbonate salts to stabilize water chemistry, promoting healthy coral growth. Trusted by hobbyists with a 4.7-star rating, it offers precise dosing instructions for optimal reef care. ## 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. Box Contains water treatment Review: Lid was loose - Lid was loose, and white powdery crust was all over the bottle. ## 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 | | Best Sellers Rank | 78,404 in Pet Supplies ( See Top 100 in Pet Supplies ) 800 in Aquarium Water Treatments | | Brand | Seachem | | Brand Name | Seachem | | Customer Reviews | 4.7 out of 5 stars 496 Reviews | | Global Trade Identification Number | 00000116066303 | | Included Components | Seachem Reef Carbonate 500ml | | Item Form | Liquid | | Item Type Name | Aquarium Conditioner | | Item Weight | 1.35 Pounds | | Item form | Liquid | | Item weight | 1.35 Pounds | | Liquid Volume | 500 Millilitres | | Liquid volume | 500 Millilitres | | Manufacturer | Seachem | | Manufacturer Part Number | 663 | | Model Number | 663 | | Target Species | reef aquarium | | UPC | 000116066303 | | Unit Count | 1 count | ## 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) ## 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. ## Frequently Bought Together - Seachem Reef Carbonate 500ml - Seachem Reef Complete 500ml - Seachem Reef Plus 500ml --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/58616116-reef-carbonate-500-ml](https://www.desertcart.co.uk/products/58616116-reef-carbonate-500-ml) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-04*