The iron fertilizer provides all aquarium plants with ferrous iron II that they can use immediately, ensuring a beautiful, fresh green color. Iron is essential for all aquarium plants as it is needed for the formation of vital green leaf. Without green leaf, the plant cannot perform photosynthesis.

Iron deficiency appears immediately with pale and yellowish young leaves (iron chlorosis). Important to know: Plants can only absorb the so-called ferrous iron. Unfortunately, this is not stable in the aquarium and oxidizes quickly, converting into ineffective ferric, "brown" iron. Tap water practically contains no iron, therefore, aquarium plants depend on regular iron fertilization.

The accompanying protection ensures the long-term availability of iron to aquarium plants (warehouse effect). E15 does not contain phosphates and nitrates, thus it does not promote the growth of algae.

Application: Simply add tablets to the aquarium water, ideally after replacing part of the water. They will dissolve slowly over a few days.

Dosing: 1 tablet per 100 L (26.4 US gal) adds 0.27 mg/l (ppm) of iron to the aquarium water. Regular use results in iron content in the optimal range of 0.05 – 0.2 mg/l (ppm).