JBL The 7 Balls (70g) Root Fertiliser Balls are nutrient-rich pellets designed to support the healthy growth of aquatic plants. They are enriched with essential nutrients, particularly iron and trace elements, which are released slowly to provide a favorable nutrient supply for plants that absorb nutrients through their roots, such as echinodori and cryptocorynae.
To use, press one or more balls into the substrate near the roots of the plants, and repeat this process annually for optimal results. These fertiliser balls are particularly suitable for freshwater aquariums and help prevent deficiency symptoms in aquatic plants.