{"product_id":"seachem-flourish-iron","title":"Seachem Flourish Iron","description":"\u003cp\u003e\u003cstrong\u003eFeed the deficiency your plants are already showing you.\u003c\/strong\u003e Seachem Flourish Iron is a concentrated ferrous gluconate iron supplement for the planted aquarium, formulated to correct the pale new growth and interveinal yellowing (chlorosis) that shows up when iron runs short — and to deepen the red colour in iron-hungry stem plants once the deficiency is fixed.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHighly bioavailable iron\u003c\/strong\u003e — supplied as ferrous gluconate at 10,000 mg\/L, a form plants take up readily.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects chlorosis\u003c\/strong\u003e — targets the yellowing between leaf veins on new growth that signals iron deficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeepens red and green colouration\u003c\/strong\u003e — iron availability drives the intensity of red pigment in species like Rotala and Ludwigia.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCarbon as a bonus\u003c\/strong\u003e — the gluconate carrier itself supplies a small amount of organic carbon alongside the iron.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSix bottle sizes\u003c\/strong\u003e — 50 mL through to 4 L.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eChelated iron supplement (ferrous gluconate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIron concentration\u003c\/th\u003e\n\u003ctd\u003e10,000 mg\/L (1% Fe by weight)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater, planted tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSizes\u003c\/th\u003e\n\u003ctd\u003e50 mL, 100 mL, 250 mL, 500 mL, 2 L, 4 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard dose\u003c\/th\u003e\n\u003ctd\u003e5 mL (1 capful) per 200 L, raises iron by approximately 0.25 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarget level\u003c\/th\u003e\n\u003ctd\u003eApproximately 0.10 mg\/L iron, maintained by daily dosing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eIngredients\u003c\/h3\u003e\u003cp\u003eDerived from: Ferrous Gluconate.\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003cth\u003eIron (Fe)\u003c\/th\u003e\n\u003ctd\u003e1% w\/w (10,000 mg\/L in solution)\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhich size do I need?\u003c\/h3\u003e\u003cp\u003eEvery size works out to under 1c per litre treated at the standard dose — the 4 L bottle is the cheapest per litre of the six, the 50 mL the most expensive, and even the smallest bottle still costs a fraction of a cent per treated litre. Because iron depletes within the day (test within 30 minutes of dosing to see the peak), Flourish Iron is dosed daily rather than weekly — a 100 L tank at standard dose uses roughly 2.5 mL a day, so a 250 mL bottle lasts about three months of daily dosing.\u003c\/p\u003e\u003ch3\u003eDosage and directions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDose 5 mL per 200 L daily, or as needed against test results and visible deficiency signs.\u003c\/li\u003e\n\u003cli\u003eEach thread on the cap measures approximately 1 mL for smaller tanks.\u003c\/li\u003e\n\u003cli\u003eTest with Seachem MultiTest Iron within 30 minutes of dosing — iron depletes quickly in a planted, filtered tank, so a same-day test after dosing is the only reliable read on how much is actually present.\u003c\/li\u003e\n\u003cli\u003eWatch new leaf growth, not old leaves — chlorosis shows first on new shoots.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for freshwater planted tanks showing chlorosis or grown for red-leaved species.\u003c\/li\u003e\n\u003cli\u003eNot a complete fertiliser — Iron supplies iron only; nitrogen, phosphorus, potassium and other trace elements still need to come from a base fertiliser such as Flourish.\u003c\/li\u003e\n\u003cli\u003eOverdosing iron can encourage algae in tanks without adequate plant mass to use it — dose to test results, not on a fixed schedule alone.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-flourish\"\u003eSeachem Flourish\u003c\/a\u003e — base trace elements alongside targeted iron dosing.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-flourish-excel\"\u003eSeachem Flourish Excel\u003c\/a\u003e — liquid carbon, dosed on its own schedule.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/seachem-flourish-nitrogen\"\u003eSeachem Flourish Nitrogen\u003c\/a\u003e — nitrogen dosing for demanding planted tanks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eSeachem doesn't publish a fixed warranty term on consumable dosing products; your purchase is still covered by the consumer guarantees under Australian Consumer Law. Ships as a standard parcel — no cold chain or special handling required.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eHow do I know if my plants are iron deficient?\u003c\/h4\u003e\u003cp\u003eLook at the newest leaves first. Yellowing between the veins while the veins themselves stay green (chlorosis) on new growth is the classic sign — iron is immobile in the plant, so old leaves stay green even when new growth is starving.\u003c\/p\u003e\u003ch4\u003eWhy dose daily instead of weekly like base Flourish?\u003c\/h4\u003e\u003cp\u003eIron depletes rapidly once dosed — Seachem recommends testing within 30 minutes to see the true peak. A weekly dose would spend most of the week at a level too low for plants to use, so Iron is designed for daily, smaller doses instead.\u003c\/p\u003e\u003ch4\u003eCan I overdose Flourish Iron?\u003c\/h4\u003e\u003cp\u003eDosing well above the target of around 0.10 mg\/L doesn't help plants take up more — iron uptake is limited by demand, not supply — and excess iron in a tank without enough plant mass to use it can contribute to algae growth. Dose to test results.\u003c\/p\u003e\u003ch4\u003eIs Flourish Iron reef or marine safe?\u003c\/h4\u003e\u003cp\u003eIt's formulated and marketed for freshwater planted aquariums; Seachem does not publish marine dosing guidance for this product.\u003c\/p\u003e","brand":"Seachem","offers":[{"title":"50 mL","offer_id":55244154372387,"sku":null,"price":13.95,"currency_code":"AUD","in_stock":true},{"title":"100 mL","offer_id":55244154405155,"sku":null,"price":18.95,"currency_code":"AUD","in_stock":true},{"title":"250 mL","offer_id":55244154437923,"sku":null,"price":27.95,"currency_code":"AUD","in_stock":true},{"title":"500 mL","offer_id":55244154470691,"sku":null,"price":43.95,"currency_code":"AUD","in_stock":true},{"title":"2 L","offer_id":55244154503459,"sku":null,"price":150.95,"currency_code":"AUD","in_stock":true},{"title":"4 L","offer_id":55244154536227,"sku":null,"price":279.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/0478-flourish-iron-2-l_da0f2254-c7bb-4402-b17e-99cf48f51489.png?v=1782710635","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/seachem-flourish-iron","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}