Hydroponic growing systems are gaining in popularity because of the relative ease of use and these systems eliminate the traditional problems with growing plants in earth: insects and fungus, among other issues. Hydroponic growing systems do not depend on soil and therefore the issue of insects and bugs and/or other harmful elements to plants are largely avoided. The device in this case circulates water through a closed system on a timed basis； the primary issue for this system is accommodating the right growing conditions for the plant. This issue is addressed by using substrate to promote healthy plant growth.
