Loading... Please wait...Aside from room temperature, water temperature in your growing garden must be kept at a recommended level to promote proper growth and nutrition in your plants. The recommended water temperature is between 60F - 75F and if this drops or increases at a certain amount, root damage may occur on your plants. Maintaining proper water temperature can be achieved easily with the use of water chillers and heaters. Let Hydrogalaxy help you shop for the best water temperature controllers with the wide array of water heaters and chillers found only in our store.