How to – Properly check your room temperature?

Atmosphere is an important variable in hydroponic gardening that needs to be controlled.  Invest in a quality thermometer that has min/max, Hygrometer, and a temperature probe. Place the probe right at the plant canopy when plants have reached desired height, until then it is advisable to keep the probe near the plants base to ensure you are maintaining desired root zone temperature. If you are using CO2, keep your temperature at 80-85 degrees Fahrenheit and relative humidity at 50%-60%. If you are not using CO2, keep your temperature around 75-78 degrees Fahrenheit, and 40%-50% relative humidity.