API Leaf Zone

API Leaf Zone is a targeted plant supplement that delivers two of the most commonly deficient nutrients in freshwater planted tanks: chelated iron and potassium. Iron is essential for chlorophyll production, while potassium drives enzymatic processes that regulate water balance and nutrient uptake throughout the plant.

The chelated formula ensures that iron remains available to plant roots and leaves rather than precipitating out of the water column. Potassium deficiency manifests as leaf pinholes and edge browning, which Leaf Zone corrects over several weeks of consistent dosing.

Leaf Zone is not a complete fertiliser — it does not supply nitrogen or phosphorus — making it ideal as an additive in well-stocked tanks where fish waste provides sufficient macronutrients.