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 and is needed for the formation of vital green leaf tissue. Without green leaves, the plant cannot perform photosynthesis. The lack of iron becomes apparent immediately: young leaves appear pale and yellowish (iron chlorosis).

Important to know: Plants can only absorb the so-called ferrous iron. Unfortunately, this is not stable in the aquarium but oxidizes quickly, turning into ineffective ferric, "brown" iron. Tap water practically contains no iron, so aquarium plants depend on regular iron fertilization.

Regular use results in an iron concentration within the optimal range of 0.05 – 0.2 mg/l (ppm). E15 contains no phosphates or nitrates and therefore does not promote algae growth.

Application:

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

Dosage:

• 1 tablet per 100 L (26.4 US gal) adds 0.27 mg/l (ppm) of iron to the aquarium water.