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.
|Amounts per 1 g|
Derived from: Ferrous Gluconate
We aim to send orders on the same day we receive them.
We use Royal Mail and DPD to dispatch the majority of orders. Orders received before 2:00pm (GMT), will be sent same day, providing all items are in stock. Orders placed after 2pm Friday will be posted the following Monday.
If you would like to receive your order on a specific day, please select DPD Express Shipping and include a note during checkout to specify your preferred delivery date.
*** FREE SHIPPING FOR UK ORDERS £100 AND OVER ***
Shipping within the UK
|Shipping service||Delivery time||Cost|
Click & collect
|Pick up in-store||
Royal Mail 1st Class
|1-3 working days||
£3.99 up to 5kg
£5.99 over 5kg
Royal Mail Tracked 24
|1-2 working days||
£5.99 up to 2KG
£6.99 over 2KG
ExpressGuaranteed UK Mainland
|1 working day||
£6.99 up to 2KG
£7.99 up to 10KG
Returns and Exchanges
Ordered a new inline atomizer but it doesn't fit? No problem, just give us a quick call or email provided the item is not damaged in anyways, and we'll process your return or exchange immediately.
We also understand that sometimes products arrive and they aren't what you expected or you have changed your mind. Again, no problem, so long as you retain the packaging and the item is not damaged, we're happy to refund or exchange.
Please get in touch via email or phone within 14 days of your order arriving for all non-perishable returns / exchanges. For perishable goods, such as plants, please get in touch the same day they arrive.
+44 01603 761900
Damaged or Perished on arrival
We pride ourselves on the quality of our products, and will never knowingly send out sub-standard or faulty products. We use trusted shipping partners, Royal Mail and DPD, because in our experience they are the best. However, accidents do happen, especially when you are in the business of selling glass and plants!
Unfortunately, we cannot take responsibility for plants that perish or deteriorate once they are in your aquarium or terrarium - the reason is simple, all aquarium and terrarium set-ups are different, and all plants have different needs. Doing your research ahead of time is all part of the learning process, and we hope our website provides enough information for you to make an informed decision. If you need more information about a product, or are unsure if it will work with your set-up, just get in touch, we won't bite!
More questions about shipping and returns? Drop us a line.
+44 01603 761900