Active Air Indoor-Outdoor Thermometer w/Hygrometer calicum This makes it extremely cost

This makes it extremely cost effective

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Helps sandy soil retain water

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it will likely become a vital part of your feeding program for overall plant growth and performance

Active Air Indoor-Outdoor Thermometer w/Hygrometer calicum This makes it extremely costActive Air's indoor outdoor thermometer gives you more. Made of sturdy materials to stand up to the climate of your indoor grow room, this essential tool features a large display to read the current temperature and humidity levels. A remote probe allows you to sample two temperatures at once. Record the high and low points for both temperature and humidity. 3 meter sensor for temperature reading only Relative humidity sensor located on side of unit