CANNA Classic has an awesome reputation among countless growers worldwide. Use for plants grown in all inert hydroponic mediums and systems recirculating or non-recirculating. The CANNA Classic nutrient line made distinctive by the colour green was developed for so called inert mediums. These mediums do not provide the plant with nutrients nor do they take them away from the plant. As a consequence all of the necessary nutrients must be added to the irrigation water. The fertilisers in the CANNA Classic line are particularly suitable for plants growing in rockwool, glass wool, perlite, clay pebbles and other similar mediums. The CANNA Classic nutrient line is uniquely crafted for use with tap water. As a result CANNA Classic nutrients prevent accumulation of salts from tap water which are damaging to the plant and the environment.