Having the right water temperature is important. That is why having a water heater or water chiller is one of the most important pieces of kit you can own when building your indoor garden.
If the temperature of your water is too cold, the growth of your plants will slow down. If it is too warm, it encourages root disease. The warmer the water, the less oxygen it can hold.
Water heaters may only needed to be used during the colder months to ensure that your plants stay within the right temperatures. In the warmer summer months, water may need to be cooled as the temperature of your plants will certainly rise. This helps to keep the roots healthy with plenty of oxygen dissolved within the water.