Seachem Flourish Iron 250ml

Flourish Iron is a liquid iron supplement for planted freshwater aquariums. It is intended for tanks where the plants' iron demand exceeds what the standard Flourish fertiliser supplies, or where a clear iron deficit has developed. Symptoms usually appear first in young shoots.

Why it matters

• The iron is supplied as ferrous gluconate, a form that plants can take up more readily than iron bound to EDTA as Fe3+.
• Because plants absorb divalent ions, Fe3+ chelates must first be converted into an available form, which costs the plant additional energy. Gluconate-bound iron skips this step.
• The product contains no phosphates and no nitrates, so it adds only iron to the water.
• One cap (5 ml) per 200 litres keeps iron at 0.1 mg/l. Smaller doses are possible: each notch on the inside thread of the cap equals 1 ml.

Specifications

• Brand: Seachem
• Product code (EAN): 000116047609
• Volume: 250 ml
• Weight: 0.25 kg
• Active ingredient: iron (Fe), 1.0%
• Iron form: ferrous gluconate
• Recommended dose: 5 ml per 200 litres of water
• Target iron concentration: 0.1 mg/l
• Measuring unit: 1 ml per cap thread notch

What it works with

Flourish Iron is designed for planted aquariums, where it is dosed alongside the Flourish fertiliser range. The dose scales with water volume, so the 5 ml per 200 litres ratio applies to tanks of any size. Iron levels can be checked with the Multi Test: Iron kit before and during dosing.