Basic menu for plant roots: special nutrient-loaded clay pellets for freshwater s Nutrient storage capacity. No deficiencies: iron and minerals provide trace elements and minerals. Phosphate- and nitrate-free. The more roots the plant develops, the more elle is able to absorb nutrients through the roots. Includes: 1 box of 7 + 13 pellets, 20 fertilizer pellets. Use: depending on plant size, push one or more pellets into root zone once a year.