Tropica Nutrition CapsulesNutrition Capsules contain both nitrogen, phosphor, iron and micro nutrients. The nutrients are slowly released as the plants need them. Use Nutrition Capsules for stem plants, Cryptocoryne, Echinodorus, Vallisneria etc. all plants with sturdy roots. Nitrogen, phosphor, iron and manganese, as well as all vital micro nutrients are released by the capsules over a period of 1 to 2 months. Place the capsules close to the roots of large solitary plants and