Tropica Plant Growth Specialised Fertiliser contains all essential nutrients needed including nitrogen (N) and phosphorus (P). Specialised Fertiliser is suitable for aquariums with many plants in relation to the number of fish, where plants can lack nitrogen (N) and phosphorus (P) which otherwise would be supplied by fish excrement and food remnants. Tropica Specialised Fertiliser is composed so that N and P in particular are supplied to the plants in the amounts and chemical forms the plants require for optimal absorption and growth. The waterplant fertilizer has been developed for plants which easily absorb nutrients from the water via the leaves, which typically are the low, compact foreground plants. The fertilizer also contributes to the supply of the nutrition large stem and rosette plants require.Use and Dosage of Tropica Tropica Plant Growth Specialised Fertiliser:The fertilizer is added each week when the water is changed. We recommend 5 ml per 50 L water. However, we recommen