Interpet No.2 Flora Boost is essential, nitrate free plant food. Many of the nutrients that are essential for healthy plant growth are not present in the artificial environment. Due to a special formulation which omits phosphates and supplies the correct balance of trace elements, FLORA BOOST will ensure optimum plant growth without stimulating algal problems. Interpet NO 2 Flora Boost is for use in coldwater and tropical freshwater systems. One 100ml bottle will treat 500 Litres