--- product_id: 263248648 title: "Seachem Reef Calcium Liquid Organic Source, 250 Ml" brand: "seachem" price: "€ 60.86" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.at/products/263248648-seachem-reef-calcium-liquid-organic-source-250-ml store_origin: AT region: Austria --- # Boosts coral growth with metabolic energy Organic polygluconate complex for max bioavailability 50,000 mg/L ultra-concentrated calcium Seachem Reef Calcium Liquid Organic Source, 250 Ml **Brand:** seachem **Price:** € 60.86 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate your reef game with liquid calcium that means business! ## Quick Answers - **What is this?** Seachem Reef Calcium Liquid Organic Source, 250 Ml by seachem - **How much does it cost?** € 60.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/263248648-seachem-reef-calcium-liquid-organic-source-250-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 - • **All Life Stages Safe:** Formulated to support every stage of your aquatic ecosystem’s life cycle. - • **Accelerates Coral Growth:** Provides metabolic energy that fuels vibrant, rapid coral development. - • **Easy-to-Use Liquid Formula:** No batteries, no fuss—just pure, effective calcium support in a compact 250 ml bottle. - • **Organic Polygluconate Complex:** Enhances calcium absorption and prevents precipitation for stable water chemistry. - • **Ultra-Concentrated Calcium Power:** Delivers a potent 50,000 mg/L calcium boost to keep your reef thriving. ## Overview SeachemReef Calcium Liquid Organic Source is a highly concentrated (50,000 mg/L) liquid calcium supplement featuring a unique polygluconate complex that maximizes calcium bioavailability, prevents precipitation, and supplies metabolic energy to accelerate coral growth. Ideal for all life stages, this 250 ml formula ensures stable, healthy reef environments with easy application. ## Description Reef Calcium is a concentrated 50,000 mg/L bioavailable polygluconate complexed calcium intended to maintain calcium in the reef aquarium without altering pH. Additionally, polygluconate contains no nitrogen or phosphorous, thus it is biologically impossible for it to lead to algae growth in a properly maintained reef system. Polygluconate complexation confers several benefits: it increases the bioavailability of the calcium, it provides a rich source of metabolic energy to help maintain peak coral growth, and it prevents calcium precipitation/alkalinity depletion. Reef Calcium utilizes a chained organic calcium rather than an ionic calcium. When a coral absorbs a molecule into its tissue, it uses the same amount of energy regardless of molecular size. However, charged molecules require more energy. When an uncharged molecule of Reef Calcium is absorbed, the coral acquires multiple calcium atoms as well as an easily metabolized carbohydrate with less energy expended than it uses for ionic calcium uptake. Therefore, at lower calcium levels, corals can still take in as much calcium through our organic chains as they would at much higher levels of ionic calcium. Reef Calcium may be used alone to maintain calcium but will provide enhanced levels of coral growth when used in conjunction with an ionic calcium supplement Reef Complete, Reef Advantage Calcium. Reef Calcium is intended to maintain calcium levels; if calcium becomes seriously depleted one should either perform a water change or use an ionic calcium supplement to restore the depleted level of calcium. Review: Used for Freshwater Snails - Used it for baby mystery snails in a separate tank after my big ones laid eggs in my main tank, The Parents had big patches of missing shell and harsh growth and I wanted to make sure they didn't have the same problem. After a few months, they have grown to the size of a grape and have no patches yet. Review: Item bot properly sealed - Ordered this item and seal was undone and product leaked in shipping bag and all over bottle. Was sent replacement for item and same issues except the whole contents of bottle was in shipping bag. ## Features - Liquid organic calcium source - Maintains calcium and accelerates coral growth - Concentrated (50,000 mg/L) - Polygluconate complexation confers several benefits: it increases the bioavailability of the calcium, it provides a rich source of metabolic energy to help maintain peak coral growth, and it prevents calcium precipitation/alkalinity depletion. ## Technical Specifications | Specification | Value | |---------------|-------| | Product Dimensions | 13.72 x 4.06 x 3.3 cm; 340.19 g | | Item model number | 356 | | Pet Life Stage | All Life Stages | | Item Form | Liquid | | Allergen Information | Sulphites Free | | Color | white | | Volume | 250 Milliliters | | Quantity | 1 | | Specific Uses | Active | | batteries required | No | | Batteries Included | No | | External Testing Certification | Não aplicável | | Item Weight | 340 g | ## Product Details - **Brand:** Seachem - **Liquid volume:** 250 Milliliters - **Item weight:** 0.75 Pounds - **Item form:** Liquid - **Target species:** Fish ## Images ![Seachem Reef Calcium Liquid Organic Source, 250 Ml - Image 1](https://m.media-amazon.com/images/I/71iMUAf13+L.jpg) ![Seachem Reef Calcium Liquid Organic Source, 250 Ml - Image 2](https://m.media-amazon.com/images/I/71+jVAXDehL.jpg) ![Seachem Reef Calcium Liquid Organic Source, 250 Ml - Image 3](https://m.media-amazon.com/images/I/81Bi7MUbGtL.jpg) ![Seachem Reef Calcium Liquid Organic Source, 250 Ml - Image 4](https://m.media-amazon.com/images/I/31W+FWcbBDL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Used for Freshwater Snails *by N***S on 2 September 2022* Used it for baby mystery snails in a separate tank after my big ones laid eggs in my main tank, The Parents had big patches of missing shell and harsh growth and I wanted to make sure they didn't have the same problem. After a few months, they have grown to the size of a grape and have no patches yet. ### ⭐ Item bot properly sealed *by K***N on 12 February 2026* Ordered this item and seal was undone and product leaked in shipping bag and all over bottle. Was sent replacement for item and same issues except the whole contents of bottle was in shipping bag. ### ⭐⭐⭐⭐⭐ Long Time Aquarium Owner *by S***R on 15 June 2026* Excellent for removing chlorine, etc. I let it sit in a gallon jug for an hour after swirling around the water. Amazing. As soon as you add it to the water the chlorine smell disappears. ## Frequently Bought Together - Seachem Reef Calcium 250ml - Brightwell Aquatics Magnesion Liquid Salt Water Conditioner - Concentrated Magnesium Supplement For Reef and Marine Aquariums, 8.45 fl oz - Brightwell Aquatics - Alkalin8.3 Concentrated KH Buffer Supplement - for All Marine Fish and Reef Aquaria - Aquarium Water Treatments, 8.45 fl oz --- ## 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.at/products/263248648-seachem-reef-calcium-liquid-organic-source-250-ml](https://www.desertcart.at/products/263248648-seachem-reef-calcium-liquid-organic-source-250-ml) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-11-14*