--- product_id: 5951852 title: "Flourish Potassium 250 mL / 8.5 fl. oz." brand: "seachem" price: "€ 18.65" currency: EUR in_stock: true url: https://www.desertcart.gr/products/5951852-flourish-potassium-250-ml-8-5-fl-oz store_origin: GR region: Greece --- # Prevents growth-limiting potassium depletion No phosphate or nitrate additives 50,000 mg/L potassium concentration Flourish Potassium 250 mL / 8.5 fl. oz. **Brand:** seachem **Price:** € 18.65 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your planted aquarium game—because your plants deserve the best! ## Quick Answers - **What is this?** Flourish Potassium 250 mL / 8.5 fl. oz. by seachem - **How much does it cost?** € 18.65 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/5951852-flourish-potassium-250-ml-8-5-fl-oz) ## 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 - • **Boost Plant Vitality:** Supercharge your aquarium’s greenery with 50,000 mg/L potassium for unstoppable growth. - • **Clean & Pure Formula:** Zero phosphate and nitrate means no unwanted algae or water pollution—just pure plant power. - • **Seamless Integration:** Perfectly complements the entire Seachem Flourish line and Fluorite gravel for a holistic aquatic ecosystem. - • **Trusted by Thousands:** Join over 3,000 happy aquarists who rate it 4.8 stars for consistent, vibrant results. - • **Essential Growth Support:** Stops potassium depletion in fast-growing or low-mineral water setups to keep plants thriving. ## Overview Seachem Flourish Potassium is a high-concentration liquid potassium supplement (50,000 mg/L) designed to prevent potassium depletion in freshwater planted aquariums. Free from phosphate and nitrate, it supports vigorous plant growth without promoting algae, integrates seamlessly with the Flourish product line, and is trusted by thousands of aquarists worldwide. ## Description Sachem Flourish Potassium contains 50,000 mg/L of potassium suitable for the natural freshwater 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 and maintain the highest level of growth. Flourish Potassium is an integral component of Sachem's plant products and is recommended for use with the entire Flourish line as well as our Fluorite gravel. Contains no phosphate or nitrate. ## Features - Potassium supplement - For planted aquariums - Contains no phosphate or nitrate ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002A5WRY | | ASIN | B0002A5WRY | | Allergen Information | Yam Free | | Best Sellers Rank | #14,534 in Pet Supplies ( See Top 100 in Pet Supplies ) #111 in Aquarium Water Treatments | | Brand Name | Seachem | | Customer Reviews | 4.8 4.8 out of 5 stars (3,075) | | Date First Available | October 2, 2001 | | Department | Unisex-Adult | | Global Trade Identification Number | 00000116046602 | | Included Components | Seachem Flourish Potassium 250ml | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Type Name | Seachem Flourish Potassium 250ml | | Item Weight | 8.8 ounces | | Item model number | 466 | | Liquid Volume | 250 Milliliters | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer Part Number | 466 | | Model Number | 466 | | Product Dimensions | 4.9 x 2.4 x 2.2 inches; 8.8 ounces | | Target Species | Fish | | UPC | 015568977138 000116046602 | | Unit Count | 1 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** Seachem - **Item Form:** Liquid - **Item Weight:** 8.8 ounces - **Liquid Volume:** 250 Milliliters - **Unit Count:** 1 Count ## Images ![Flourish Potassium 250 mL / 8.5 fl. oz. - Image 1](https://m.media-amazon.com/images/I/51mOdi91cQL.jpg) ## Available Options This product comes in different **Size** options. ## 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). ## 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.gr/products/5951852-flourish-potassium-250-ml-8-5-fl-oz](https://www.desertcart.gr/products/5951852-flourish-potassium-250-ml-8-5-fl-oz) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-08-13*