In the summer heat or the winter freeze, water temperature in your hydroponic systems can suffer. Most plants prefer a water temperature in the range of 68-72F, and a solution lower than that will stunt root development, and a solution higher will also slow root development and …create an environment where harmful bacteria and algae can flourish. This issue is much more common in grow tents that are put in non-climate controlled areas, like garages, basements, or sheds. Reservoir chillers and heaters are straightforward devices, they can raise and lower the temperature of your water supply in hydroponic systems to correct for cold or hot climates. Shop now and get your chill on with HTG Supply.