--- product_id: 256598941 title: "Flourish Potassium Supplement, 250 ml" brand: "seachem" price: "€ 23.23" currency: EUR in_stock: true reviews_count: 7 category: "Seachem" url: https://www.desertcart.at/products/256598941-flourish-potassium-supplement-250-ml store_origin: AT region: Austria --- # Optimizes Aquatic Plant Growth 50,000 mg/L Potassium Concentration Potassium Sulfate Formula - No NPK Imbalance Flourish Potassium Supplement, 250 ml **Brand:** seachem **Price:** € 23.23 **Availability:** ✅ In Stock ## Summary > 🌿 Unlock Your Aquarium’s Full Growth Potential with Precision Potassium! ## Quick Answers - **What is this?** Flourish Potassium Supplement, 250 ml by seachem - **How much does it cost?** € 23.23 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/256598941-flourish-potassium-supplement-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 - • **Pure & Potent Formula:** Contains 50,000 mg/L potassium derived from potassium sulfate for maximum bioavailability. - • **Trusted Quality & Safety:** BPA-free liquid formula, USA-made, highly rated with 4.7 stars from 700+ plant enthusiasts. - • **Versatile Volume Options:** Available in multiple sizes from 50 ml to 4 L to fit any aquarium scale or growth phase. - • **Vigorous Growth Catalyst:** Prevents potassium depletion that causes yellowing leaves, promoting lush, healthy aquatic plants. - • **Precision Potassium Boost:** Targets potassium levels without altering nitrogen or phosphorus, ensuring balanced plant nutrition. ## Overview Seachem Flourish Potassium Supplement delivers a concentrated 50,000 mg/L potassium boost derived from potassium sulfate, designed specifically for planted aquariums. It prevents potassium depletion—a common growth limiter—without disturbing nitrogen or phosphorus balance, ensuring vibrant, healthy aquatic plants. Available in multiple sizes, this BPA-free liquid formula is trusted by thousands of aquarium professionals and hobbyists alike. ## Description Flourish Potassium™ Contains 50,000 Mg/L Of Potassium Suitable For The Natural Planted Aquarium. Potassium Is One Of Several Elements That Are Vitally Important To Maintaining A Vigorous Level Of Growth In A Planted Aquarium. Potassium Can Become Depleted In A Rapidly Growing System Or When The Source Water Has A Low Mineral Content. In These Cases Potassium Could Become The Limiting Factor To Growth. Use Flourish Potassium™ To Prevent Potassium Depletion (Signs Of Which Include Yellowing In Older Leaves) And Maintain The Highest Level Of Growth. The Most Easily Obtained Sources Of Potassium Are Potassium Nitrate And Potassium Phosphate. Both Of These Sources Add To Either Nitrogen Or Phosphorus As Well As Potassium, Making It Virtually Impossible To Target A Specific Npk Ratio. Flourish Potassium™ Is Derived From Potassium Sulfate, Allowing The User To Adjust Potassium Levels Without Affecting Nitrogen Or Phosphorus. Sizes: 50 Ml, 100 Ml, 250 Ml, 500 Ml, 2 L, 4 L. Review: Good price - Good product at a great price Review: عند وصول المنتج كانت درجة حرارته مرتفه بسبب سوء التخزين ،السوال الن تضر الحراره بكفائة المنتج - عند وصول المنتج كانت درجة حرارته مرتفه بسبب سوء التخزين ،السوال الن تضر الحراره بكفائة المنتج ## Features - Flourish Potassium contains 50,000 mg/L of potassium suitable for the natural planted aquarium. Potassium is one of several elements that are vitally important to maintaining a vigorous level of growth in a planted aquarium. - . Potassium can become depleted in a rapidly growing system or when the source water has a low mineral content. In these cases potassium could become the limiting factor to growth. - Use Flourish Potassium to prevent potassium depletion (signs of which include yellowing in older leaves) and maintain the highest level of growth. - Volume : 250 ml - Details : Flourish Potassium contains 50,000 mg/L of potassium suitable for the natural planted aquarium ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002A5WRY | | Allergen Information | BPA-Free | | Best Sellers Rank | #2,204 in Pet Supplies ( See Top 100 in Pet Supplies ) #8 in Aquarium Water Quality Testing & Treatment | | Brand | Seachem | | Brand Name | Seachem | | Country of Publication | USA | | Customer Reviews | 4.7 out of 5 stars 709 Reviews | | Global Trade Identification Number | 00000116046602 | | Item Form | Liquid | | Item Type Name | Planted Aquarium Products | | Item Weight | 249 g | | Item form | Liquid | | Item weight | 249 g | | Liquid Volume | 250 Milliliters | | Liquid volume | 250 Milliliters | | Manufacturer | Seachem | | Manufacturer Part Number | 466 | | Model Number | 466 | | Number of Packs | 1 | | Target Species | Aquatic Plants | | UPC | 015568977138 000116046602 | | Unit Count | 1 Count | | Unit count | 1 Count | ## Product Details - **Brand:** Seachem - **Item form:** Liquid - **Item weight:** 249 g - **Liquid volume:** 250 Milliliters - **Number of Packs:** 1 ## Images ![Flourish Potassium Supplement, 250 ml - Image 1](https://m.media-amazon.com/images/I/51R0e6x0CsL.jpg) ## Questions & Answers **Q: Is this safe for bettas?** A: Yes! At the moment, my lonely Betta has been living in a heavily planted 40 gallon tank with some trumpet snails. I have been using only seachem products and they have not not affected him nor the snails, negatively. However use caution when dosing - follow directions. If tank isn’t heavily planted I would half the doses... **Q: Can I use flourish potassium on hibiscus plants?** A: Would work on any plants I would think. **Q: How many ml do i use for a 72 gal and a 75 gal tank?** A: 10 ml per 60 gal. 2 - 3 times a week per the instructions. **Q: Will it work on watermelons** A: This product is intended for aquarium use. I suppose it would work in a garden scenario, but is expensive by comparison to garden fertilizers (which are great for plants, but generally kill fish if you put them in an aquarium). ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good price *by M***H on 15 August 2025* Good product at a great price ### ⭐ عند وصول المنتج كانت درجة حرارته مرتفه بسبب سوء التخزين ،السوال الن تضر الحراره بكفائة المنتج *by ع***د on 15 June 2021* عند وصول المنتج كانت درجة حرارته مرتفه بسبب سوء التخزين ،السوال الن تضر الحراره بكفائة المنتج ### ⭐⭐⭐⭐⭐ Bonne pousse *by T***L on 3 September 2024* J'avais remarqué un manque de potassium dans mon eau maintenant que je l'ai mis mes plantes sont magnifiques je recommande ce produit !! ## Frequently Bought Together - Seachem Flourish Potassium 250ml - Seachem Flourish Nitrogen 250ml --- ## 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/256598941-flourish-potassium-supplement-250-ml](https://www.desertcart.at/products/256598941-flourish-potassium-supplement-250-ml) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-20*