The water temperature in hydroponic systems is something that many new gardeners tend to overlook. Most plants are better off with cool water, specifically water that’s between 65 and 70 degrees Fahrenheit. The pumps and lights of indoor hydroponic systems create heat, and in order to maintain a low water temperature, many gardeners use a chiller. It is very important to understand that cold water holds more dissolved oxygen than warm water. For example, water at a temperature of 65 degrees Fahrenheit has an oxygen capacity twice that of water at 85 degrees Fahrenheit. The water temperature is the conduit for oxygen to be absorbed by the roots. Continue reading
