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SEACHEM FLOURISH IRON 250ml – High-Concentration Ferrous Iron Supplement (Fe²⁺) for Freshwater Aquarium Plants
Seachem Flourish Iron 250ml is a targeted liquid iron fertilizer formulated with ferrous gluconate (Fe²⁺) to deliver an optimal and readily absorbable iron source for planted freshwater aquariums. This 250ml format is ideal for medium to large tanks or regular long-term use, offering professional-grade support for preventing and correcting iron deficiencies that cause leaf yellowing (chlorosis), slow growth, and dull coloration—especially in red aquatic plants.
Unlike EDTA-chelated iron (Fe³⁺), Flourish Iron uses ferrous iron (Fe²⁺), which is the preferred form for aquatic plants due to its direct availability without needing energy-consuming reduction. It enhances chlorophyll production, boosts photosynthesis, and promotes vibrant leaf coloration in demanding species like Ludwigia, Rotala, Alternanthera, Ammannia, and Echinodorus.
Free of phosphates and nitrates, Flourish Iron helps avoid algae outbreaks and integrates perfectly with the full Seachem line of fertilizers for complete and safe plant nutrition.
Main features:
10,000 mg/L of highly bioavailable ferrous iron (Fe²⁺)
Rapid absorption to prevent and treat chlorosis
Supports vibrant green and red leaf coloration
Phosphate- and nitrate-free, safe for all aquarium livestock
Ideal format for larger tanks or frequent use
Pairs well with Flourish, Excel, Trace, Potassium, and more
Recommended dosage:
5 ml per 200 liters of water
Use MultiTest Iron™ to maintain iron levels around 0.10 mg/l
Adjust dosage based on plant growth or deficiency symptoms
Each cap notch equals 1 ml for precise measurement
Why choose Seachem Flourish Iron 250ml:
Seachem Flourish Iron 250ml delivers ferrous iron in its most effective form for healthy plant growth, chlorophyll production, and rich coloration. A must-have for vibrant planted tanks with nutrient-demanding aquatic plants.
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