SKU: 97209616657

Seachem Flourish Iron

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Description

Seachem Flourish IronSeachem Flourish Iron Iron is immobile in plants. This means that plants cannot divert iron from older leaves to new ones. Therefore, deficiency symptoms appear first on new or young leaves. Because plants use iron to produce chlorophyll, a lack of iron results in chlorosis, or yellowing, of the younger leaves. Stems may also appear short and slender. If the deficiency is severe and prolonged, each new leaf emerges lighter in color than the preceding

Seachem Flourish Iron

Iron is immobile in plants. This means that plants cannot divert iron from older leaves to new ones. Therefore, deficiency symptoms appear first on new or young leaves. Because plants use iron to produce chlorophyll, a lack of iron results in chlorosis, or yellowing, of the younger leaves. Stems may also appear short and slender. If the deficiency is severe and prolonged, each new leaf emerges lighter in color than the preceding leaf.

When choosing an iron supplement, it is important to know the distinction between the two forms of iron. The iron will be in one of two oxidation states: ferrous having a +2 charge, or ferric having a +3 charge. Ferrous iron, the preferred iron form and is soluble in water at any pH. Ferric iron, however, is only soluble below a pH of around 5.5; but if the pH is higher than 5.5, which more than likely it will be in a planted aquarium, the ferric iron will become insoluble and precipitate, settling in the root zone. Once this occurs, foliar absorbtion becomes impossible.

To overcome this precipitation, competing products employ a chelate of ferric iron: iron-EDTA. While this does keep it soluble, it has a couple of drawbacks with respect to foliar uptake of iron. (1) Iron-EDTA bonding is very strong, thus very little of the iron will be available to the plants over a given time frame and (2) Physiological energy must be expended by the plant in order to extract the ferric iron from EDTA-iron and then convert (reduce) it to the ferrous form. Our approach is different in that we use a complex (not chelate) of ferrous iron in Flourish Iron™.

Flourish Iron™ is a highly concentrated (10,000 mg/L) ferrous iron gluconate supplement. Plants are able to much more easily derive a benefit from Flourish Iron™ because ferrous iron gluconate is already in the ferrous form so they do not expend energy reducing it. Despite what other manufacturers may intimate, gluconate is not harmful to plants or fish. In fact, ferrous gluconate is better suited to foliar feeding than is iron-EDTA owing to the relatively weaker iron-gluconate bonding vs. iron-EDTA bonding. In addition, ferrous gluconate has the added bonus of being a source of carbon.

Recommended Dosage: Use 1 capful (5 ml) for each 200 L (50 gallons*) or as required to maintain about 0.10 mg/L iron. For smaller doses, please note that each cap thread is approximately 1 ml. Use Seachem's MultiTest: IronTM test kit (#434288) to monitor iron concentrations. Use as needed to combat signs of iron deficiency (usually seen in new growth), which include: chlorosis (yellowing) of tissue between veins and short and slender stems.

*1.0% Soluble Iron (Fe)
Derived from: Ferrous Gluconate

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SKU: 97209616657

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Christina Visser
Massapequa, US
★★★★★ 5
My go to!
Style: Tropical Coconut
I freaking love this sunscreen, not only is the smell divine, but a little goes a long way. It doesn’t leave a greasy feeling or residue.
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Reviewed in the United States on December 15, 2025
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C. Herman
Bozeman, US
★★★★★ 5
Great stuff.
Style: Tropical Coconut
No weird smell or greasy residue, feels great on the skin. Tried it while on vacation (friend's lotion), and bought some when I got home. It is my go to now.
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Reviewed in the United States on July 1, 2025
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M
Bozeman, US
★★★★★ 5
My fave!!
Size: 6 Fl Oz (Pack of 1)
Wow. I'm so impressed with this conditioner that I'd pay three times what it cost, but I'm glad it's so reasonably priced! For reference, I bought this for myself, not a child, and my hair is medium-fine, wavy, and just past my shoulders. My hair is in good condition since I gave up heat styling a few months ago, starting using more organic hair products, and also switched from chemical hair color to using pure henna. But even though my scalp is oily, my hair is on the dry side because it's still recovering from the abuse I used to put it through, plus I live in the desert. So I like a rich conditioner that deeply moisturizes my hair, and this one does that better than any other conditioner I've ever tried, and I've tried SO SO many. My hair feels hydrated and silky after using this, and shines like crazy in the sunlight. The same day I used it, my husband commented "Your hair looks so healthy." This conditioner also brings out my waves and reduces frizz, without feeling or looking heavy... but a little goes a LONG way... this is a serious conditioner, not a watered-down drugstore product. So if you over-do it, your hair may go limp. I can't stand perfume-y smelling hair products, so I'm happy to say the aroma is natural, and while I wouldn't call it "light," it's certainly not strong. I really love the scent and would describe it as warm and comforting. I hope they never stop making this stuff. It reminds me of another conditioner I really like, by Accure, but I have to say I like the results and aroma of this one even better.
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Reviewed in the United States on August 4, 2017
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Gizel Roache
Natrona Heights, US
★★★★★ 5
Very useful for babies
Size: 6 Fl Oz (Pack of 1)
This is a must buy. I bought this for my son who has hypersensitivity. A little bit goes a long way and it is very concentrated. The scent is not nauseating. It washes off well and is definitely worth the price.
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Reviewed in the United States on May 29, 2026
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Brittney
Waukegan, US
★★★★★ 5
Extremely nourishing and moisturizing
Size: 6 Fl Oz (Pack of 1)
Really like this conditioner for my daughter. It leaves her hair so soft after using, I use to use shea moisture kids conditioner on her hair and it would never feel silky or smooth after a shower. This conditioner definitely makes it feel nourished. I also love that it’s vegan. really good for your kids hair. I recommend it! As previous reviews states it has a bad scent, I don’t think so at all. The scent is just more natural. It’s not sweet and fake like these other conditioners. Love the product!
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Reviewed in the United States on May 28, 2020

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