{"product_id":"seachem-flourish-iron-250ml","title":"Seachem Flourish Iron 250 mL – Planted Aquarium Iron Supplement","description":"\u003cp\u003eSeachem Flourish Iron 250 mL is a highly concentrated ferrous iron supplement formulated for freshwater planted aquariums. It provides iron in the ferrous, or Fe²⁺, form that remains soluble in aquarium water and is readily available for plant uptake.\u003c\/p\u003e\n\u003cp\u003eIron is essential for chlorophyll production and healthy new growth. Flourish Iron can help correct iron deficiency symptoms such as pale or yellowing young leaves, short slender stems, and reduced coloration in red, orange, and pink aquarium plants.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentrated Iron Supplement:\u003c\/strong\u003e Contains 10,000 mg\/L of iron for targeted planted-aquarium dosing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFerrous Gluconate Iron:\u003c\/strong\u003e Supplies iron in the soluble Fe²⁺ form preferred by aquatic plants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Chlorophyll Production:\u003c\/strong\u003e Helps plants maintain healthy green tissue and active new growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects Iron Deficiency:\u003c\/strong\u003e Useful when new leaves show chlorosis or pale coloration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Red Plant Coloration:\u003c\/strong\u003e Helps maintain the iron availability needed by red and fast-growing aquarium plants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Added Nitrogen or Phosphate:\u003c\/strong\u003e Allows targeted iron supplementation without intentionally adding macronutrients\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConvenient 250 mL Bottle:\u003c\/strong\u003e Suitable for small, medium, and regularly fertilized planted aquariums\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Seachem\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e Flourish Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 250 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Size:\u003c\/strong\u003e Approximately 8.5 fl oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Freshwater aquarium plant iron supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIron Source:\u003c\/strong\u003e Ferrous gluconate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIron Concentration:\u003c\/strong\u003e 10,000 mg\/L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Iron:\u003c\/strong\u003e 1%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAquarium Type:\u003c\/strong\u003e Freshwater planted aquariums\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Iron Level:\u003c\/strong\u003e Approximately 0.10 mg\/L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFreshwater planted aquariums\u003c\/li\u003e\n\u003cli\u003eRed, orange, and pink aquarium plants\u003c\/li\u003e\n\u003cli\u003eFast-growing stem plants\u003c\/li\u003e\n\u003cli\u003eAquariums showing signs of iron deficiency\u003c\/li\u003e\n\u003cli\u003eNew leaves with pale or yellow tissue\u003c\/li\u003e\n\u003cli\u003eShort, slender, or weak new stems\u003c\/li\u003e\n\u003cli\u003eLow-tech and high-tech planted aquariums\u003c\/li\u003e\n\u003cli\u003eTargeted iron supplementation alongside complete plant fertilizers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cp\u003eUse one capful, or 5 mL, of Seachem Flourish Iron for every 50 US gallons of aquarium water or as needed to maintain an iron concentration of approximately 0.10 mg\/L.\u003c\/p\u003e\n\u003cp\u003eEach thread inside the cap represents approximately 1 mL for smaller aquariums. Use a dosing syringe when precise amounts below 1 mL are required.\u003c\/p\u003e\n\u003cp\u003eThe standard 5 mL dose per 50 gallons raises iron by approximately 0.25 mg\/L. Iron is used quickly by aquarium plants, so the concentration may fall rapidly after dosing.\u003c\/p\u003e\n\u003ch3\u003eApproximate Dosage Guide\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Gallon Aquarium:\u003c\/strong\u003e Approximately 0.5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Gallon Aquarium:\u003c\/strong\u003e Approximately 1 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20-Gallon Aquarium:\u003c\/strong\u003e Approximately 2 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40-Gallon Aquarium:\u003c\/strong\u003e Approximately 4 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50-Gallon Aquarium:\u003c\/strong\u003e 5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75-Gallon Aquarium:\u003c\/strong\u003e Approximately 7.5 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100-Gallon Aquarium:\u003c\/strong\u003e 10 mL\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese amounts are proportional calculations based on Seachem’s standard dosage. Actual dosing frequency should be adjusted according to plant demand, aquarium conditions, iron testing, and visible deficiency symptoms.\u003c\/p\u003e\n\u003ch3\u003eTesting Iron Levels\u003c\/h3\u003e\n\u003cp\u003eSeachem recommends maintaining an iron concentration of approximately 0.10 mg\/L. Because plants can use Flourish Iron rapidly, test the water within 30 minutes of dosing when checking the aquarium’s response.\u003c\/p\u003e\n\u003cp\u003eA low or unreadable iron result several hours after dosing does not necessarily mean the supplement failed. The iron may already have been absorbed by plants or otherwise removed from the water column.\u003c\/p\u003e\n\u003cp\u003eDo not continuously add more product solely because a later test shows no measurable iron. Consider plant growth, deficiency symptoms, dosing history, and the reliability of the test kit.\u003c\/p\u003e\n\u003ch3\u003eSigns of Iron Deficiency\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYellowing or pale coloration on new leaves\u003c\/li\u003e\n\u003cli\u003eGreen veins surrounded by yellow tissue\u003c\/li\u003e\n\u003cli\u003eNew leaves emerging lighter than older leaves\u003c\/li\u003e\n\u003cli\u003eShort or slender stems\u003c\/li\u003e\n\u003cli\u003eReduced red, orange, or pink coloration\u003c\/li\u003e\n\u003cli\u003eSlow or weak new growth\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIron is relatively immobile within plants, meaning plants cannot easily move stored iron from older leaves into new growth. For this reason, deficiency symptoms generally appear first on young leaves.\u003c\/p\u003e\n\u003ch3\u003eUsing Flourish Iron with Flourish\u003c\/h3\u003e\n\u003cp\u003eSeachem Flourish contains a smaller amount of iron along with a broad blend of plant nutrients and trace elements. Flourish Iron provides a separate, concentrated iron source for aquariums where plant demand exceeds the iron supplied by a complete fertilizer.\u003c\/p\u003e\n\u003cp\u003eSeachem notes that Flourish Iron may require more frequent dosing because iron is rapidly depleted, while Flourish is normally dosed less often. Keeping these products separate allows iron to be adjusted without repeatedly adding every nutrient contained in Flourish. :contentReference[oaicite:1]{index=1}\u003c\/p\u003e\n\u003ch3\u003eUsing Flourish Iron with Other Fertilizers\u003c\/h3\u003e\n\u003cp\u003eFlourish Iron may be used alongside carbon supplements, complete plant fertilizers, root tabs, potassium supplements, and other planted-aquarium products when each is dosed according to its label.\u003c\/p\u003e\n\u003cp\u003eAvoid directly mixing concentrated fertilizers together in the same container unless the manufacturer specifically permits it. Add products separately to an area with good aquarium water movement.\u003c\/p\u003e\n\u003ch3\u003ePlanted Aquarium Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMeasure each dose carefully\u003c\/li\u003e\n\u003cli\u003eTest iron within 30 minutes when monitoring concentration\u003c\/li\u003e\n\u003cli\u003eObserve new leaves for signs of deficiency\u003c\/li\u003e\n\u003cli\u003eUse a complete fertilizer for nutrients beyond iron\u003c\/li\u003e\n\u003cli\u003eMaintain suitable lighting and carbon availability\u003c\/li\u003e\n\u003cli\u003eKeep nitrate, phosphate, potassium, and trace nutrients balanced\u003c\/li\u003e\n\u003cli\u003eDo not increase iron solely to compensate for inadequate lighting or carbon\u003c\/li\u003e\n\u003cli\u003eContinue regular water changes and aquarium maintenance\u003c\/li\u003e\n\u003cli\u003eKeep a log of dosing amounts and plant response\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Planted Aquarium Note\u003c\/h3\u003e\n\u003cp\u003eFlourish Iron is a targeted iron supplement and does not replace a complete planted-aquarium fertilizer. Plants may also require nitrogen, phosphorus, potassium, magnesium, trace elements, carbon, suitable lighting, and stable water conditions.\u003c\/p\u003e\n\u003cp\u003eYellowing leaves may have several causes, including nitrogen deficiency, magnesium deficiency, root damage, poor lighting, unstable carbon dioxide, or general plant stress. New-growth chlorosis is more strongly associated with iron deficiency than yellowing that begins on older leaves.\u003c\/p\u003e\n\u003cp\u003eAdding excessive iron does not guarantee stronger plant coloration and may contribute to nutrient imbalance. Dose according to plant demand and testing rather than automatically increasing the amount.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is Seachem Flourish Iron used for?\u003c\/strong\u003e\u003cbr\u003eFlourish Iron supplies concentrated ferrous iron for freshwater aquarium plants and helps prevent or correct iron deficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much Flourish Iron should I use?\u003c\/strong\u003e\u003cbr\u003eUse 5 mL for every 50 US gallons or as needed to maintain approximately 0.10 mg\/L iron.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should Flourish Iron be dosed?\u003c\/strong\u003e\u003cbr\u003eDose according to plant demand and iron levels. Because iron is used rapidly, some heavily planted aquariums may require frequent or daily supplementation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat form of iron does Flourish Iron contain?\u003c\/strong\u003e\u003cbr\u003eIt contains ferrous gluconate, which supplies soluble ferrous iron in the Fe²⁺ form.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Flourish Iron add nitrogen or phosphate?\u003c\/strong\u003e\u003cbr\u003eNo nitrogen or phosphate is listed in the guaranteed analysis. It is intended as a targeted iron supplement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are common signs of iron deficiency?\u003c\/strong\u003e\u003cbr\u003eCommon signs include yellowing between the veins of new leaves, pale new growth, short slender stems, and reduced coloration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Flourish Iron make red plants redder?\u003c\/strong\u003e\u003cbr\u003eAdequate iron can support healthy coloration, but red plant color also depends on genetics, lighting, carbon availability, nitrate levels, and overall nutrient balance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Flourish Iron needed when using Flourish?\u003c\/strong\u003e\u003cbr\u003eFlourish contains iron, but densely planted aquariums or tanks with high iron demand may benefit from additional Flourish Iron.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I test iron after dosing?\u003c\/strong\u003e\u003cbr\u003eSeachem recommends testing within 30 minutes because the iron may be used rapidly by aquarium plants.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does my test show no iron shortly after dosing?\u003c\/strong\u003e\u003cbr\u003ePlants may have absorbed the iron quickly, or the test kit may not detect all forms equally. Evaluate dosing history and plant response before adding more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Flourish Iron be used in a low-light aquarium?\u003c\/strong\u003e\u003cbr\u003eYes, when plants show a confirmed need for additional iron. Low-light aquariums usually have slower nutrient demand, so conservative dosing is appropriate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan too much iron cause algae?\u003c\/strong\u003e\u003cbr\u003eExcessive or unbalanced fertilization can contribute to aquarium problems. Use the recommended dosage and maintain balanced lighting, carbon, and nutrients.\u003c\/p\u003e\n\u003ch3\u003eAvailable at Tropical Treasures Wyo\u003c\/h3\u003e\n\u003cp\u003eSeachem Flourish Iron 250 mL provides concentrated ferrous iron for correcting iron deficiency and supporting healthy freshwater aquarium plant growth. Visit Tropical Treasures Wyo in Cheyenne, Wyoming, to shop Seachem plant supplements, live aquarium plants, root tabs, planted substrates, aquarium lighting, water test kits, and aquascaping essentials.\u003c\/p\u003e","brand":"Tropical Treasures Wyo LLC","offers":[{"title":"Default Title","offer_id":52975151808725,"sku":null,"price":7.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/4545\/8133\/files\/SC04760-2T.png?v=1784901678","url":"https:\/\/tropicaltreasureswyo.com\/products\/seachem-flourish-iron-250ml","provider":"Tropical Treasures Wyo LLC","version":"1.0","type":"link"}