This System Basically Letting The Roots Of The Plant Grow Down Into A Nutrient Solution Or Water Culture. Soil-Less Growing Kit Is A Hobby Growers Entry Into The Hydroponics World, A Must Have For Every Home/Terrace /Balcony Or Backyard Grower To Try A Soil-Less Way . Dwc ( Deep Water Culture ): Dwc Provides No Medium Support For Roots, This Is A Very Fast Growing And Water Loving Plants, Making Them An Ideal Choice For The Deep Water Culture Hydroponic System. This Setup Can Be As Simple As A Planter Of Mixed Hydroponic Nutrients With A Hole In The Lid To Support A Pot Or It Can Be Made Large Enough To Support Multiple Plants. Dwc Hydroponics Requires Nothing More Than A Simple Air Stone To Keep The Nutrient Solution Fresh. Water Level Indicator: This Water Level Indicator Is Used To Measure Water/Nutrient Levels In The Square Planter And The Indicator Green Line Indicates The Sufficient Water/Nutrient Level For The Plant And Red Line Indicates To Refill The Water/Nutrient.