{"product_id":"seachem-flourish-iron-500ml","title":"Seachem Flourish Iron 500 mL – Planted Aquarium Iron Supplement","description":"\u003cp\u003eSeachem Flourish Iron 500 mL is a highly concentrated ferrous iron supplement formulated for freshwater planted aquariums. It contains 10,000 mg\/L of iron derived from ferrous gluconate, providing iron in the soluble Fe²⁺ form that aquatic plants can readily use.\u003c\/p\u003e\n\u003cp\u003eIron is essential for chlorophyll production and healthy new plant growth. Flourish Iron can help prevent or correct iron-deficiency symptoms such as pale young leaves, yellowing between leaf veins, short slender stems, and reduced coloration in red, orange, or bronze aquarium plants.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly Concentrated Iron:\u003c\/strong\u003e Contains 10,000 mg\/L of iron for targeted planted-aquarium supplementation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFerrous Gluconate:\u003c\/strong\u003e Supplies soluble ferrous iron in the Fe²⁺ form preferred by aquatic plants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Chlorophyll Production:\u003c\/strong\u003e Helps maintain healthy green tissue and active new growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects Iron Deficiency:\u003c\/strong\u003e Useful when young leaves appear pale or yellow between the veins\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Plant Coloration:\u003c\/strong\u003e Helps maintain iron availability for red, orange, pink, and bronze aquarium plants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeted Supplement:\u003c\/strong\u003e Allows iron to be adjusted independently from other plant nutrients\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge 500 mL Bottle:\u003c\/strong\u003e Convenient for larger planted aquariums, multiple tanks, and regular dosing\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 500 mL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquivalent Size:\u003c\/strong\u003e Approximately 17 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\u003eRecommended 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, pink, and bronze aquarium plants\u003c\/li\u003e\n\u003cli\u003eAlternanthera species\u003c\/li\u003e\n\u003cli\u003eLudwigia species\u003c\/li\u003e\n\u003cli\u003eRotala species\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\u003ePale or yellow young leaves\u003c\/li\u003e\n\u003cli\u003eTargeted iron supplementation alongside complete fertilizers\u003c\/li\u003e\n\u003cli\u003eLow-tech and high-tech planted aquariums\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. Use a dosing syringe when smaller or more precise amounts are required.\u003c\/p\u003e\n\u003cp\u003eThe standard dose raises aquarium iron by approximately 0.25 mg\/L. Plants use iron rapidly, so the measurable concentration may fall soon 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, visible deficiency symptoms, water testing, and aquarium conditions.\u003c\/p\u003e\n\u003ch3\u003eTesting Iron Levels\u003c\/h3\u003e\n\u003cp\u003eSeachem recommends maintaining approximately 0.10 mg\/L of iron. Because plants may absorb Flourish Iron rapidly, test the aquarium within 30 minutes of dosing when evaluating the iron concentration.\u003c\/p\u003e\n\u003cp\u003eA low or unreadable result later in the day does not necessarily mean the product failed. The iron may already have been absorbed by plants or removed from the water column.\u003c\/p\u003e\n\u003cp\u003eDo not repeatedly add more product solely because a later test shows little measurable iron. Consider plant appearance, growth, dosing history, and the accuracy of the test kit.\u003c\/p\u003e\n\u003ch3\u003eSigns of Iron Deficiency\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePale or yellow young leaves\u003c\/li\u003e\n\u003cli\u003eYellow tissue between green leaf veins\u003c\/li\u003e\n\u003cli\u003eNew leaves appearing lighter than older leaves\u003c\/li\u003e\n\u003cli\u003eShort or slender stems\u003c\/li\u003e\n\u003cli\u003eWeak new growth\u003c\/li\u003e\n\u003cli\u003eReduced red, orange, pink, or bronze coloration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIron is relatively immobile within plants, so deficiency symptoms usually appear first on young leaves and new growth rather than older leaves.\u003c\/p\u003e\n\u003ch3\u003eSupporting Red Aquarium Plants\u003c\/h3\u003e\n\u003cp\u003eAdequate iron availability can help support healthy coloration in plants such as Alternanthera, Ludwigia, Rotala, and other red or bronze species. However, iron alone does not determine whether a plant develops intense red coloration.\u003c\/p\u003e\n\u003cp\u003ePlant genetics, lighting intensity, carbon availability, nitrate levels, overall nutrient balance, and aquarium stability also influence color. Adding excessive iron will not compensate for inadequate lighting, carbon, or other missing nutrients.\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 broader mixture 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 be dosed more regularly because iron is rapidly depleted, while Flourish is normally used less frequently. Keeping the products separate allows iron to be adjusted without repeatedly adding every nutrient found in Flourish. :contentReference[oaicite:1]{index=1}\u003c\/p\u003e\n\u003ch3\u003eUsing Flourish Iron with CO₂\u003c\/h3\u003e\n\u003cp\u003eFlourish Iron does not require injected carbon dioxide to supply iron to aquarium plants. It may be used in both low-tech and high-tech planted aquariums.\u003c\/p\u003e\n\u003cp\u003ePressurized CO₂ can increase plant growth and nutrient demand. Aquariums with strong lighting and injected CO₂ may therefore consume iron more rapidly than low-light aquariums.\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 nitrogen, phosphorus, potassium, and trace nutrients balanced\u003c\/li\u003e\n\u003cli\u003eDo not increase iron solely to compensate for poor lighting or unstable CO₂\u003c\/li\u003e\n\u003cli\u003eContinue regular water changes and aquarium maintenance\u003c\/li\u003e\n\u003cli\u003eKeep a dosing log to track 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. Aquarium plants may also require nitrogen, phosphorus, potassium, magnesium, trace elements, carbon, suitable lighting, and stable water conditions.\u003c\/p\u003e\n\u003cp\u003eYellowing leaves can have several causes, including nitrogen deficiency, magnesium deficiency, root damage, poor lighting, unstable carbon dioxide, or general plant stress. Iron deficiency is more commonly associated with chlorosis that begins on young leaves.\u003c\/p\u003e\n\u003cp\u003eAdding excessive iron does not guarantee stronger growth or coloration. Dose according to plant demand, visible symptoms, and testing rather than automatically following a fixed schedule.\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 measured iron levels. Some heavily planted aquariums may require regular or daily dosing, while slower-growing systems may require less.\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 iron in the Fe²⁺ form.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow concentrated is Flourish Iron?\u003c\/strong\u003e\u003cbr\u003eIt contains 10,000 mg\/L of iron, equivalent to 1% iron.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are common signs of iron deficiency?\u003c\/strong\u003e\u003cbr\u003eCommon signs include pale or yellow young leaves, green veins surrounded by yellow tissue, short slender stems, and weak new growth.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes Flourish Iron make red plants more colorful?\u003c\/strong\u003e\u003cbr\u003eAdequate iron can support healthy coloration, but plant color also depends on genetics, lighting, carbon availability, nitrate levels, and overall nutrition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Flourish Iron needed when using Flourish?\u003c\/strong\u003e\u003cbr\u003eFlourish contains some iron, but heavily planted aquariums or systems 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 aquarium plants can use the iron rapidly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need injected CO₂ to use Flourish Iron?\u003c\/strong\u003e\u003cbr\u003eNo. Flourish Iron may be used with or without injected CO₂. High-growth CO₂ systems may consume iron more quickly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan Flourish Iron be used in low-light aquariums?\u003c\/strong\u003e\u003cbr\u003eYes, when plants show a need for additional iron. Low-light aquariums usually grow more slowly and may require less frequent dosing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan excessive iron cause aquarium problems?\u003c\/strong\u003e\u003cbr\u003eExcessive or unbalanced fertilization may contribute to nutrient imbalance or algae issues. Measure carefully and avoid unnecessary overdosing.\u003c\/p\u003e\n\u003ch3\u003eAvailable at Tropical Treasures Wyo\u003c\/h3\u003e\n\u003cp\u003eSeachem Flourish Iron 500 mL provides concentrated ferrous iron for preventing 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":52224434569429,"sku":null,"price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/4545\/8133\/files\/SC04730-2T.png?v=1784901851","url":"https:\/\/tropicaltreasureswyo.com\/products\/seachem-flourish-iron-500ml","provider":"Tropical Treasures Wyo LLC","version":"1.0","type":"link"}