A Grobo's intake fans do not all turn on when you begin a grow.
- The fans are off during Germination (Stage 1) to prevent them from drying out your seedling.
- The bottom fan will turn on during Early Vegetation (Stage 2).
- Then, in Late Vegetation (Stage 3), both intake fans will be on for the remainder of the grow.
These are a Grobo's intake fans.
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