Doesn't care what time it is, just how often to come on and for how long. CO 2 resumes when fan shuts off. Records high and low readings.
Negative ions help to eliminate air-born diseases, fungus and molds in the grow room.
When it comes to air quality it is always better to be sure rather than sorry. The best crop insurance money can buy. Carbon Dioxide Generators Plants eat CO 2 during the daylight cycle. Increasing the atmospheric content of CO 2 in the grow room promotes faster growth, healthier plants and larger blooms. Co 2 enrichment requires certain micro-climatic conditions for best results.