Divalent iron for rich green leaves

E15 FerActiv

  • E15 FerActiv iron fertilizer provides all aquarium plants with divalent nutrient iron that they can use immediately, thereby ensuring a beautiful, fresh green colour.
  • Symptoms of deficiency such as yellow, glassy leaves are thereby virtually completely cured, while young leaves can once again display a rich, green colour.    


Iron is of crucial importance for all aquarium plants. It is needed for generating the all-important chlorophyll. Without chlorophyll, the plant cannot photosynthesize. The effects of iron deficiency are immediately apparent: the young leaves appear pale and yellowish (iron-induced chlorosis).

Please note: plants can only absorb divalent iron. This is unfortunately not stable in an aquarium, and is quickly oxidised to become ineffective trivalent "brown" iron. Tap water contains virtually no iron. Aquarium plants are therefore reliant upon regular iron fertilization. 





Special tip:

Commercially available iron tests often cannot detect chelated iron.  These tests indicate diminished levels, even though the aquarium water actually contains enough iron.


Art. no.Package sizeFor water volume
454920 tablets2.000 l
455040 tablets4.000 l
  • Dosage recommendation

    Application: Every 4 weeks (e.g. always on the 15th of the month)
    Dosage: 1 tab E15 FerActive per 100 litres of aquarium water

  • Declaration

    NK fertilizer 2+14 with iron and manganese, with complexing agent EDTA

    2.1%   N total nitrogen, 14% K2O water soluble potassium oxide
    2.98% Fe total iron = water-soluble iron*.
    0.74% Mn total manganese = water soluble manganese*
    *up to 50% EDTA chelation at pH 3-7

    Net weight: see packaging
    Distributor: Dennerle GmbH, 66981 Münchweiler, Germany

    Other constituents: 2.69% S water soluble sulphur, 4.02 % Na water soluble sodium, 55.9 % organic substance
    Conditioning aid: As filler: sodium sulphate; as pressing aid: cellulose, silicon dioxide, PVP, calcium stearate
    Application aids: As complexing agent: EDTA
    Storage instructions: store in a dry place at room temperature. Store away from sunlight, heat and frost. Store out of reach of children and pets.
    Application guidelines: Only for fertilization of ornamental plants in aquaria.
    See enclosed package leaflet for detailed application instructions and dosages. Note: Official guidance and recommendations take precedence.