I never used a airblock. (which allows pressure to excape with air not being drawn back in, dont want it to blow) I would take a 7 gallon tall camping water storage contain and attach a garden hose to the spout (perfect fit) and put the hoses (had a few) through the wall of the grow room to excape in front of a fan. Shake them twice a day after adding 2 pounds of sugar and 30 + ml of active yeast with 4 to 5 gallons of water.

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c