--- product_id: 12404889 title: "Seachem Flourish Excel 4 L / 1 fl. gal." brand: "seachem" price: "€ 247.15" currency: EUR in_stock: true category: "Seachem" url: https://www.desertcart.fi/products/12404889-seachem-flourish-excel-4-l-1-fl-gal store_origin: FI region: Finland --- # 4L bioavailable organic carbon safe dosing for fish & plants iron reducing for Fe+2 uptake Seachem Flourish Excel 4 L / 1 fl. gal. **Brand:** seachem **Price:** € 247.15 **Availability:** ✅ In Stock ## Summary > 🌱 Elevate your aquatic garden—because your plants deserve the best carbon boost! ## Quick Answers - **What is this?** Seachem Flourish Excel 4 L / 1 fl. gal. by seachem - **How much does it cost?** € 247.15 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/12404889-seachem-flourish-excel-4-l-1-fl-gal) ## 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 - • **Maximize Iron Absorption:** Promotes ferrous iron (Fe+2) uptake, ensuring your aquatic plants get the most bioavailable iron for vibrant growth. - • **Safe & Fish-Friendly Formula:** Clinically safe for all fish species, with tailored dosing to protect sensitive plants like Anacharis. - • **Effortless Maintenance Dosing:** Simple capful dosing system—1 cap per 40L initially, then 1 cap per 200L every other day keeps your aquarium thriving. - • **Perfect CO2 Alternative or Supplement:** Ideal for aquariums where CO2 injection risks pH imbalance, providing a reliable carbon source without the hassle. - • **Boost Plant Growth with Bioavailable Carbon:** Flourish Excel delivers 4 liters of ready-to-use organic carbon, bypassing CO2 dependency for faster photosynthesis. ## Overview Seachem Flourish Excel is a 4-liter liquid aquarium conditioner providing bioavailable organic carbon and iron-reducing properties to enhance aquatic plant photosynthesis and growth. Safe for fish and easy to dose, it serves as a powerful CO2 alternative or supplement, promoting healthier, more vibrant plants in freshwater aquariums. ## Description Flourish Excel™ is a source of bioavailable organic carbon. All plants require a source of carbon. This is typically obtained from CO2, but, may also be derived from simple organic compounds (such as photosynthetic intermediates). The use of either CO2 injection or Flourish Excel™ does not necessarily negate the use of the other. Because the processes of producing photosynthetic intermediates and building onto them occur simultaneously, one can derive a substantial benefit with the use of Flourish Excel™ either alone or in conjunction with CO2 . The combination is particularly ideal for situations when continuing to add CO2 could result in dangerously low pH levels. Flourish Excel™ also has iron reducing properties which promote the ferrous state of iron (Fe+2), which is more easily utilized by plants than ferric iron (Fe+3). The reason plants need CO2 is to produce longer chain carbon compounds also known as photosynthetic intermediates. Photosynthetic intermediates includes compounds such as ribulose 1,5-bisphosphate, and 2-carboxy-3-keto-D-arabinitol 1,5 bisphosphate. Although the names are complicated, the structures are quite simple (5 carbon chains). Flourish Excel™ does not contain these specific compounds per se, but one that is quite similar. By dosing with Flourish Excel™ you bypass the involvement of CO2 and introduce the already finished, structurally similar compounds. It is in its structural similarity that Flourish Excel™ is able to be utilized in the carbon chain building process of photosynthesis. Simple chemical or enzymatic steps can easily convert it to any one to any one of the above named compounds (or a variety of others). ## Features - CARBON PRODUCTION: All plants require a source of carbon, and Flourish Excel is a great and convenient source of bioavailable organic carbon. - IRON PRODUCTION: Flourish Excel also possesses iron reducing properties, thus promoting the ferrous state of iron (Fe+2), which is more easily utilized by plants than ferric iron (Fe+3). - PHOTOSYNTHESIS: Plants must produce longer chain carbon compounds (photosynthetic intermediates). By dosing with Flourish Excel you bypass the involvement of chain carbon compounds and introduce the already finished, structurally similar compounds. - TREATMENT: On initial use or after a major (> 40%) water change, use 1 capful of Flourish Excel (5 mL) for every 40 L (10 US gallons). Thereafter, use 1 capful for every 200 L (50 US gallons) daily or every other day. For smaller dosing please note that each cap thread is approximately 1 mL. - SAFETY: Flourish Excel is completely safe for fish, however, if you have Anacharis in an aquarium in which you are dosing Flourish Excel, then it is recommended to use it every other day rather than daily. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002A5WRE | | ASIN | B0002A5WRE | | Allergen Information | Yam Free | | Best Sellers Rank | #54,865 in Pet Supplies ( See Top 100 in Pet Supplies ) #472 in Aquarium Water Treatments | | Brand Name | Seachem | | Customer Reviews | 4.7 4.7 out of 5 stars (153) | | Date First Available | April 8, 2008 | | Global Trade Identification Number | 00000116045902 | | Included Components | Liquid | | Item Form | Liquid | | Item Type Name | Aquarium Conditioner | | Item Weight | 2 pounds | | Item model number | 459 | | Liquid Volume | 4 liters | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer Part Number | FBA_1238 | | Model Number | 459 | | Number of Items | 1 | | Pet Type | Fish | | Product Dimensions | 4.5 x 6.88 x 11.5 inches; 2 pounds | | Target Species | Fish | | UPC | 000116045902 | | Unit Count | 1 Count | ## Product Details - **Brand:** Seachem - **Item Form:** Liquid - **Item Weight:** 2 pounds - **Liquid Volume:** 4 liters - **Unit Count:** 1 Count ## Images ![Seachem Flourish Excel 4 L / 1 fl. gal. - Image 1](https://m.media-amazon.com/images/I/61FVPUYjybL.jpg) --- ## 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.fi/products/12404889-seachem-flourish-excel-4-l-1-fl-gal](https://www.desertcart.fi/products/12404889-seachem-flourish-excel-4-l-1-fl-gal) --- *Product available on Desertcart Finland* *Store origin: FI* *Last updated: 2026-09-12*