--- product_id: 177026930 title: "Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz)" brand: "lotus nutrients" price: "€ 68.05" currency: EUR in_stock: true reviews_count: 8 category: "Lotus Nutrients" url: https://www.desertcart.hr/products/177026930-lotus-nutrients-cal-mag-pro-series-calcium-magnesium-supplement-hydroponic store_origin: HR region: Croatia --- # 100% natural purity pre-treats coco coir 4:1 Ca:Mg perfect balance Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) **Brand:** lotus nutrients **Price:** € 68.05 **Availability:** ✅ In Stock ## Summary > 🌱 Elevate your garden game with nature’s perfect nutrient blend! ## Quick Answers - **What is this?** Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) by lotus nutrients - **How much does it cost?** € 68.05 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/177026930-lotus-nutrients-cal-mag-pro-series-calcium-magnesium-supplement-hydroponic) ## Best For - lotus nutrients enthusiasts ## Why This Product - Trusted lotus nutrients brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Coco Coir Detox:** Flushes harmful sodium and chloride, prepping your medium for peak plant health. - • **Pure Plant Power:** Harness 100% naturally sourced nutrients for vibrant, chemical-free growth. - • **Balanced Growth Booster:** Strengthens stems, enriches leaves, and ensures efficient nutrient absorption from seedling to harvest. - • **Trusted Grower-Backed Quality:** Crafted by California experts with industry-leading support, empowering every grower’s success. - • **Precision Calcium-Magnesium Ratio:** Optimized 4:1 Ca:Mg formula tailored for coco coir to prevent deficiencies and boost uptake. ## Overview Lotus Nutrients Cal-Mag Pro Series is a 30oz powdered plant nutrient formulated with a precise 4:1 calcium to magnesium ratio, designed specifically for hydroponic and coco coir grows. Made from 100% natural ingredients, it detoxifies coco coir by flushing excess sodium and chloride, promoting strong stems, healthy leaves, and optimal nutrient uptake. Developed by experienced growers in California, it offers an easy-to-use, balanced feeding solution for both indoor and outdoor gardens. ## Description PREVENTS CALCIUM AND MAGNESIUM DEFICIENCY BEFORE IT STARTS: Lotus Cal-Mag delivers bioavailable calcium and magnesium in a fast-dissolving powder that corrects and prevents the yellowing, brown spots, and stunted growth caused by cal-mag lockout. Essential during both vegetative and flowering stages. BUILT FOR COCO COIR, LED ENVIRONMENTS, AND FILTERED WATER: Coco coir naturally binds calcium, creating deficiency even when your base nutrients contain it. LED grow lights drive faster photosynthesis, increasing calcium and magnesium demand. Reverse osmosis and filtered water strips these minerals entirely. Cal-Mag Pro Series addresses all three scenarios. ONE POWDER FOR EVERY GROWER AND EVERY MEDIUM: Hobbyists running a single tent, commercial facilities managing hundreds of plants, and soil gardeners supplementing outdoor beds all use the same simple ratio. No separate A and B bottles. No complex mixing sequences. One scoop dissolves completely with no residue. COMPLETES THE LOTUS PRO SERIES FEEDING PROGRAM: Cal-Mag works alongside Lotus Grow during veg and Lotus Bloom plus Lotus Boost during flowering. The Lotus Intro Kit includes sample sizes of all four products so growers can test the full system before committing. One brand, one feeding chart, consistent results. 100% WATER SOLUBLE WITH NO SEDIMENT OR LINE CLOGGING: Unlike liquid cal-mag supplements that settle and separate, Lotus Cal-Mag powder dissolves fully in seconds. Safe for drip irrigation, automated dosing systems, hand watering, and reservoir mixing. Clean solution every time, no shaking required. Review: Works great 8.4 of 10 - I would recommend this product I’m not gonna blame it for having salt buildup I still use their product I don’t have any more salt buildup now I haven’t had any time recently but if you do use this product have a salt meter or be a pro Review: Solid product - I really like this product and recommend it. It seems to be high quality. It is easy to work with and it dissolves well too. ## Features - PREVENTS CALCIUM AND MAGNESIUM DEFICIENCY BEFORE IT STARTS: Lotus Cal-Mag delivers bioavailable calcium and magnesium in a fast-dissolving powder that corrects and prevents the yellowing, brown spots, and stunted growth caused by cal-mag lockout. Essential during both vegetative and flowering stages. - BUILT FOR COCO COIR, LED ENVIRONMENTS, AND FILTERED WATER: Coco coir naturally binds calcium, creating deficiency even when your base nutrients contain it. LED grow lights drive faster photosynthesis, increasing calcium and magnesium demand. Reverse osmosis and filtered water strips these minerals entirely. Cal-Mag Pro Series addresses all three scenarios. - ONE POWDER FOR EVERY GROWER AND EVERY MEDIUM: Hobbyists running a single tent, commercial facilities managing hundreds of plants, and soil gardeners supplementing outdoor beds all use the same simple ratio. No separate A and B bottles. No complex mixing sequences. One scoop dissolves completely with no residue. - COMPLETES THE LOTUS PRO SERIES FEEDING PROGRAM: Cal-Mag works alongside Lotus Grow during veg and Lotus Bloom plus Lotus Boost during flowering. The Lotus Intro Kit includes sample sizes of all four products so growers can test the full system before committing. One brand, one feeding chart, consistent results. - 100% WATER SOLUBLE WITH NO SEDIMENT OR LINE CLOGGING: Unlike liquid cal-mag supplements that settle and separate, Lotus Cal-Mag powder dissolves fully in seconds. Safe for drip irrigation, automated dosing systems, hand watering, and reservoir mixing. Clean solution every time, no shaking required. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B082YGN72H | | Best Sellers Rank | #67,029 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,598 in Garden Fertilizers | | Brand | Lotus Nutrients | | Brand Name | Lotus Nutrients | | Coverage | Medium | | Customer Reviews | 4.6 out of 5 stars 413 Reviews | | Global Trade Identification Number | 00029882816066 | | Item Form | Powder | | Liquid Volume | 30 Fluid Ounces | | Manufacturer | Lotus Nutrients | | Mixing Ratio | 4:1 | | Model Number | CalMag | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | L-CM-2 | | Specific Uses For Product | Hydroponic | | Target Species | coco based grows | | UPC | 029882816066 | | Unit Count | 30.0 Ounce | ## Product Details - **Brand:** Lotus Nutrients - **Item Form:** Powder - **Liquid Volume:** 30 Fluid Ounces - **Specific Uses For Product:** Hydroponic - **Global Trade Identification Number:** 00029882816066 ## Images ![Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) - Image 1](https://m.media-amazon.com/images/I/71bsQxscwhL.jpg) ![Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) - Image 2](https://m.media-amazon.com/images/I/81UdjCQvqML.jpg) ![Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) - Image 3](https://m.media-amazon.com/images/I/81jB-UK4VLL.jpg) ![Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) - Image 4](https://m.media-amazon.com/images/I/81jssN+qXTL.jpg) ![Lotus Nutrients Cal-Mag Pro Series, Calcium Magnesium Supplement for Hydroponic Plants, Water Soluble Powder for Coco Coir, LED Grows, and RO Water, Indoor and Outdoor Gardens (30oz) - Image 5](https://m.media-amazon.com/images/I/81hCeJSsJWL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Lotus has a unique look and feel. Why is that?** A: Due to the complexity of our powdered blend, Lotus Nutrients will have a consistency similar to kinetic sand, which is exactly as it should be. Its unique texture is caused by the multitude of essential micro and macro nutrients we use in our mix. **Q: Can I expect Lotus Nutrients to completely dissolve?** A: Although you may see some residual undissolved humate casings left over in the solution, all nutrient content has been released. The end solution and these leftover residuals will have zero negative impact on your grow. **Q: Do I need to use any other products with Lotus?** A: Lotus was designed as an all-in-one product line, without the need for additional nutrients outside of the recommended feeding schedule. Our Pro Series formulas are designed to give your plants everything they need to produce unmatched harvests. **Q: Is Lotus organic?** A: Lotus is a naturally derived product composed of raw ingredients containing essential micro and macro elements for all your growing needs. As a grower, you can expect beautiful, clean end results, but is not a certified organic product. **Q: When applying to soil, should I mix Lotus with water first?** A: Yes. In order for the macro and micro elements to be fully activated and utilized by the plants, Lotus should be mixed with water when applying to soil. We recommend following the feeding schedule on our website for optimal results. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great 8.4 of 10 *by V***S on February 9, 2026* I would recommend this product I’m not gonna blame it for having salt buildup I still use their product I don’t have any more salt buildup now I haven’t had any time recently but if you do use this product have a salt meter or be a pro ### ⭐⭐⭐⭐⭐ Solid product *by T***E on September 25, 2025* I really like this product and recommend it. It seems to be high quality. It is easy to work with and it dissolves well too. ### ⭐⭐⭐⭐⭐ A+ *by J***N on March 30, 2026* Plants love it ## Frequently Bought Together - Lotus Nutrients Cal-Mag Pro Series - All Natural Premium Powdered Plant Nutrients with Calcium and Magnesium for Hydroponic Coco Coir and Soil | Improve Plant Health Indoor and Outdoor Gardens (30oz) - Lotus Nutrients Starter Kit (Bloom, Boost, and Grow) - Most Advanced Plant Nutrients and Bloom Booster - Powder Plant Fertilizer for Soil, Coco Coir, Hydroponics - Plant Food for Any Medium - Carboflush Pro Series - Harvest Flavor Enhancer, Naturally Derived Nutrient Powder for Soil, Hydroponics & Coco Coir, Premium Fertilizer, Water Soluble Hydroponic Solution, Indoor/Outdoor Use - 9 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.hr/products/177026930-lotus-nutrients-cal-mag-pro-series-calcium-magnesium-supplement-hydroponic](https://www.desertcart.hr/products/177026930-lotus-nutrients-cal-mag-pro-series-calcium-magnesium-supplement-hydroponic) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-24*