--- product_id: 48995766 title: "Seachem Reef Complete Liquid ionic Calcium Source, 500 ml" brand: "seachem" price: "£25.63" currency: GBP in_stock: true category: "Seachem" url: https://www.desertcart.co.uk/products/48995766-seachem-reef-complete-liquid-ionic-calcium-source-500-ml store_origin: GB region: United Kingdom --- # 100% fully soluble formula 160,000 mg/L ionic calcium concentration Proudly made in the USA Seachem Reef Complete Liquid ionic Calcium Source, 500 ml **Brand:** seachem **Price:** £25.63 **Availability:** ✅ In Stock ## Summary > 🌊 Elevate Your Reef Game with Seachem’s Ionic Calcium Power! ## Quick Answers - **What is this?** Seachem Reef Complete Liquid ionic Calcium Source, 500 ml by seachem - **How much does it cost?** £25.63 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/48995766-seachem-reef-complete-liquid-ionic-calcium-source-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 - • **Safe & Allergen-Free:** Gentle on your aquatic ecosystem with zero allergens and a 3-year warranty. - • **Triple Mineral Power:** Calcium, magnesium, and strontium combined for balanced reef chemistry. - • **Instantly Soluble Formula:** No residue, no hassle—just pure, bioavailable calcium for thriving corals. - • **Trusted by Aquarists Worldwide:** Join thousands of reef pros who rely on Seachem’s proven quality. - • **Ultra-Concentrated Ionic Calcium:** Boost your reef’s vitality with 60% more calcium than standard solutions. ## Overview Seachem Reef Complete is a premium 500 ml liquid ionic calcium supplement delivering 160,000 mg/L calcium concentration, enhanced with magnesium and strontium chlorides. Its 100% soluble formula ensures rapid absorption, promoting healthy coral growth and reef vitality. Made in the USA and allergen-free, it’s trusted by aquarists for reliable, balanced aquarium water treatment. ## Description Product Description Seachem Reef Complete 500Ml Ingredients Calcium Chloride, Magnesium Chloride, Strontium Chloride 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); }); }); Directions Add directly to aquarium water according to the concentrations indicated in the highlights. Box Contains water treatment See more ## Features - Causes serious eye irritation. - Liquid ionic calcium source - 160,000 mg/L vs. 100,000 mg/L - 100% soluble. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000256976 | | Allergen Information | Allergen-Free | | Best Sellers Rank | 28,263 in Pet Supplies ( See Top 100 in Pet Supplies ) 281 in Aquarium Water Treatments | | Brand Name | Seachem | | Country Of Origin | USA | | Customer Reviews | 4.7 4.7 out of 5 stars (751) | | Global Trade Identification Number | 00000116033305 | | Included Components | water condiditoner | | Item Form | Liquid | | Item Type Name | water conditioner | | Item Weight | 0.6 Kilograms | | Liquid Volume | 500 Millilitres | | Manufacturer | Seachem | | Manufacturer Part Number | 333 | | Model Number | 333 | | Number of Items | 1 | | Pet Type | Fish | | Product Warranty | 3 years | | Target Species | Fish | | UPC | 015568976964 000116033305 | | Unit Count | 1 count | ## Product Details - **Brand:** Seachem - **Item form:** Liquid - **Item weight:** 0.6 Kilograms - **Liquid volume:** 500 Millilitres - **Unit count:** 1 count ## Images ![Seachem Reef Complete Liquid ionic Calcium Source, 500 ml - Image 1](https://m.media-amazon.com/images/I/715iiJ0uezL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I have an activated carbon reactor, will the reactor remove this stuff?** A: I don't know the answer but I shut my off for a few hours. **Q: What distinguishes this from their regular calcium additive?** A: It's more than just calcium. It has all the elements of saltwater mixes. You use Reef Plus with this, and your saltwater tank gets the added vitamins and amino acids it needs to be healthy. **Q: Seachem reef calcium. will it help strengthen the shell of my freshwater turtle? i have a reeve’s turtle/chinese pond turtle.** A: Made for saltwater! Need better foods for your turtle. Pond turtles don't need calcium supplements because it's usually in the water if you do water replacements! **Q: My calcium (159) and magnesium (870) levels are low in my nano 13.5g saltwater tank. Will this boost both or do I also need a magnesium additive?** A: Water changes work better than anything in these smaller tanks. Is this a hard coral tank? I use Seachem Reef Complete and Reef Plus together. If its a coral tank and not a fish tank, then make sure your using a reef salt mix with those extra additives. You can also add Reef Rubble pieces to keep your levels up in between water changes. Smaller tanks need more water changes because things change quicker with less space. ## Frequently Bought Together - Seachem Reef Complete 500ml - Seachem Reef Plus 500ml - Seachem Reef Carbonate 500ml --- ## 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.co.uk/products/48995766-seachem-reef-complete-liquid-ionic-calcium-source-500-ml](https://www.desertcart.co.uk/products/48995766-seachem-reef-complete-liquid-ionic-calcium-source-500-ml) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-11-08*