Hydroponic system convertible to an open or closed system

摘要

A new and improved hydroponic system including a plant supporting chamber having an inert, supportive medium therein; a collection reservoir positioned below the plant supporting chamber; a pump reservoir for containing a nutrient solution and delivering the nutrient solution to the plant supporting chamber and first and second valve means for operating the hydroponic system as either a closed or an open hydroponic system as desired.