--- product_id: 51247232 title: "Flourish Potassium Supplement, 250 ml" brand: "seachem" price: "€ 33.18" currency: EUR in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.be/products/51247232-flourish-potassium-supplement-250-ml store_origin: BE region: Belgium --- # Rapid potassium absorption Boosts plant health & growth 50,000 mg/L ultra-concentrated Flourish Potassium Supplement, 250 ml **Brand:** seachem **Price:** € 33.18 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your aquarium’s green game — don’t let your plants miss out! ## Quick Answers - **What is this?** Flourish Potassium Supplement, 250 ml by seachem - **How much does it cost?** € 33.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/51247232-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 - • **Precision Dosing:** Easy 5 mL capful dosing for every 125 L ensures perfect potassium levels. - • **Visible Results in Days:** Watch chlorosis, necrosis, and weak stems vanish as plants flourish. - • **Phosphate & Nitrate Free:** Keeps your aquarium clean and balanced without harmful additives. - • **Ultra-Concentrated Formula:** Delivers a potent 50,000 mg/L potassium boost for thriving aquatic plants. - • **Trusted by Aquascaping Pros:** Join thousands of enthusiasts elevating their planted tanks with Seachem. ## Overview Seachem Flourish Potassium is a highly concentrated (50,000 mg/L) liquid supplement designed to optimize potassium levels in planted aquariums. Free from phosphates and nitrates, it supports vibrant plant growth and combats deficiency symptoms like yellowing and weak stems. Easy to dose and trusted by thousands, it’s a must-have for any serious aquascaper. ## Description Product Description Seachem Flourish Potassium 250Ml Directions Use 1 capful (5 mL) for every 125 L (30 US gallons). This dose raises potassium by 2 mg/L. Repeat 2–3 times per week or as needed in response to signs of potassium deficiency in older leaves which include: chlorosis (yellowing), necrosis (death/browning), pinholes in leaves, and weak stems and roots. Box Contains water treatment Review: Noticeable Results in Just Days! - Really impressed with this supplement! After just a few days of using it, my planted tank is already looking healthier and more vibrant. The leaves are greener, and overall plant growth seems to have improved noticeably. Easy to dose and a great addition to my routine. Definitely a must-have for planted tanks! Review: Aquatic plant must have. - One of the essential elements required by aquarium plants, I wouldn’t be without it. 👍 ## Features - Contains sensitizing substances. May produce an allergic reaction. - Potassium supplement for the planted aquarium - Highly concentrated (50,000 mg/L) - Does not contain phosphate or nitrate ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002A5WRY | | Allergen Information | Yam Free | | Best Sellers Rank | 19,271 in Pet Supplies ( See Top 100 in Pet Supplies ) 245 in Aquarium Water Treatments | | Brand | Seachem | | Brand Name | Seachem | | Country Of Origin | USA | | Customer Reviews | 4.7 out of 5 stars 2,964 Reviews | | Global Trade Identification Number | 00000116046602 | | Item Form | Liquid | | Item Type Name | Seachem Flourish Potassium 250ml | | Item Weight | 0.55 Pounds | | Item form | Liquid | | Item weight | 0.55 Pounds | | Liquid Volume | 250 Millilitres | | Liquid volume | 250 Millilitres | | Manufacturer | Seachem | | Manufacturer Part Number | 466 | | Model Number | 466 | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Aquatic Plants | | UPC | 015568977138 000116046602 | | Unit Count | 250.0 millilitre | | Unit count | 250.0 millilitre | ## Product Details - **Brand:** Seachem - **Item form:** Liquid - **Item weight:** 249 g - **Liquid volume:** 250 Millilitres - **Manufacturer:** Seachem ## Images ![Flourish Potassium Supplement, 250 ml - Image 1](https://m.media-amazon.com/images/I/51mOdi91cQL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How much do i use of this 160 litres fish tank** A: it depends on how much you need to raise potassium levels by in your tank, 6-7ml should raise a 160 litre tank by 2mg per litre, personally i use 25 ml on water change day to push to my preferred mg/l then dose accordingly through the week, the more live plants you have the more you would require but each tank has there own requirements, if you dose things such as standard flourish etc then your already dosing potassium in small amounts **Q: Can you use this brand on house/ outdoor plants.** A: I think it would be to concentrated the recommendation is 5ml to 200L ## Customer Reviews ### ⭐⭐⭐⭐⭐ Noticeable Results in Just Days! *by B***G on 24 March 2026* Really impressed with this supplement! After just a few days of using it, my planted tank is already looking healthier and more vibrant. The leaves are greener, and overall plant growth seems to have improved noticeably. Easy to dose and a great addition to my routine. Definitely a must-have for planted tanks! ### ⭐⭐⭐⭐⭐ Aquatic plant must have. *by J***D on 18 March 2025* One of the essential elements required by aquarium plants, I wouldn’t be without it. 👍 ### ⭐⭐⭐⭐⭐ good stuff *by S***N on 28 September 2021* using for a while now, always trust seachem for shrimp safe items ## 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.be/products/51247232-flourish-potassium-supplement-250-ml](https://www.desertcart.be/products/51247232-flourish-potassium-supplement-250-ml) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-06-28*