CO2 DetectorEnsure your CO2 supply is performing at its absolute peak, allowing your plants to fully prosper and yield with a CO2 Detector. This handy, affordable, easy to use device gives you a clear backlit readout of real time Carbon Dioxide ppm. Using this information you can easily determine whether your CO2 inputs are sufficient to sustain your plants at any given stage in their development. Carbon dioxide is essential for photosynthesis during all stages