Water culture systems do not use medium. Some of the more popular water culture systems include raft systems, nutrient film techniques, and aeroponics. Hydroponic gardening requires an energy source in order to grow. Usually, natural sunlight is used, but during the shorter and darker days of winter, many hydroponic gardeners use artificial lights to increase the intensity of light or to expand the daylight length. Of course hydroponic plants can be grown in greenhouses and nurseries as well. The sterile medium used in hydroponic systems give home gardeners the benefit of not having to remove weeds, and minimizes soil-borne pests and diseases. If your plants are grown hydroponically, they will be healthier than plants grown in soil, because all of the growth elements and nutrients are made readily available during growth. Typical beginning tables for your plants include plastic tubs, a child’s swimming pool or fish tank. A gardener can also buy any of the items they need for their grow room from stores specializing in hydroponic supplies. Once you have your grow room or greenhouse set up, you can decide which plants that you want to try and grow. The need reactant molecules to fit precisely into their gaps so all of the negative and positive charges have to line up exactly. Plants are able to change their own cellular pH level to stop or help speed up a certain enzyme reaction. The electrical charges in soil particles are different from those in mixtures with no soil. For optimal growth, the amount of light your plants receive can be the difference between life and death. Too many lights can dry out your plants while too few can have your plants stretching desperately towards the lights. All plants respond differently to light depending on the intensity, wavelength and duration it receives. Gardeners can give nature a helping hand while enjoying the therapeutic benefits of their garden. Gardeners will be able to watch the spectacular improvements that growing hydroponically can bring to their garden. Hydroponics has always been an ecologically sound gardening choice. It uses much less water than conventional gardening and does not erode the soil or add toxins to the environment.