Tower84 commentedweek 01d ago
Have fun and success with your first living soil grow. Most of the moisture comes from the transpiration of the plants - the bed itself uses much less. But 320 liters is already a reasonable bed, so you'll have to manage a lot of moisture during the flowering stage. I only have 110 liters, and for me, it's been 1.8 liters daily in a 60 x 60 cm tent (1 plant / 110 liters bed / up to 29 degrees). In the veg stage, you can keep the bed wetter (100 mbar) and in the flowering stage drier (120 mbar).
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