--- product_id: 256598941 title: "Flourish Potassium Supplement, 250 ml" brand: "seachem" price: "€ 16.26" currency: EUR in_stock: true reviews_count: 7 category: "Seachem" url: https://www.desertcart.ie/products/256598941-flourish-potassium-supplement-250-ml store_origin: IE region: Ireland --- # Optimizes aquatic plant growth 50,000 mg/L potassium concentration Potassium sulfate base for precise dosing Flourish Potassium Supplement, 250 ml **Brand:** seachem **Price:** € 16.26 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your planted aquarium’s vitality—don’t let potassium hold you back! ## Quick Answers - **What is this?** Flourish Potassium Supplement, 250 ml by seachem - **How much does it cost?** € 16.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/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 - • **Vigorous Plant Growth:** Prevents yellowing leaves by maintaining essential potassium for lush aquascapes. - • **Rapid Absorption Formula:** Liquid form ensures quick uptake for fast-acting nutrient replenishment. - • **Trusted Quality & Safety:** BPA-free, USA-made formula with a 4.7-star rating from 676 aquascaping pros. - • **Precision Potassium Boost:** Target potassium levels without altering nitrogen or phosphorus balance. - • **Mineral Deficiency Solution:** Ideal for low-mineral or fast-growing planted tanks to avoid growth limitations. ## Overview Seachem Flourish Potassium Supplement delivers a potent 50,000 mg/L potassium dose in a liquid form derived from potassium sulfate, enabling precise nutrient management without impacting nitrogen or phosphorus levels. Designed for natural planted aquariums, it prevents potassium depletion that causes leaf yellowing, supporting vigorous plant growth especially in fast-growing or low-mineral water systems. BPA-free and highly rated, this 250 ml supplement is a must-have for aquascaping enthusiasts aiming for lush, healthy aquatic plants. ## 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 ## 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 | #7,690 in Pet Supplies ( See Top 100 in Pet Supplies ) #36 in Aquarium Water Quality Testing & Treatment | | Brand Name | Seachem | | Country of Publication | USA | | Customer Reviews | 4.7 4.7 out of 5 stars (676) | | Global Trade Identification Number | 00000116046602 | | Item Form | Liquid | | Item Type Name | Planted Aquarium Products | | Item Weight | 0.55 Pounds | | Liquid Volume | 250 Milliliters | | Manufacturer | Seachem | | Manufacturer Part Number | 466 | | Model Number | 466 | | Target Species | Aquatic Plants | | UPC | 015568977138 000116046602 | | Unit Count | 1 Count | ## Product Details - **Brand:** Seachem - **Item form:** Liquid - **Item weight:** 0.55 Pounds - **Liquid volume:** 250 Milliliters - **Manufacturer:** Seachem ## 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 ### ⭐ Review *by ع***د on 15 June 2021* عند وصول المنتج كانت درجة حرارته مرتفه بسبب سوء التخزين ،السوال الن تضر الحراره بكفائة المنتج ### ⭐⭐⭐⭐⭐ Review *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.ie/products/256598941-flourish-potassium-supplement-250-ml](https://www.desertcart.ie/products/256598941-flourish-potassium-supplement-250-ml) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-05-16*