I leave my fan on at all times, personally, just so that the plants get fresh air (e.g. air containing co2). The plants consume the co2 in the air they 'breathe', so keeping the air moving is good for them, just as it's good for miners to have fresh air for the oxygen they need. The only time I turn off the fans is when someone needs to enter the room for some reason, and I don't want to advertise what's going on.
jamstigator Reviewed by jamstigator on . is it ok to turn fan off for 6 or 12hour dark period? hey guys i switched my lights on 12/12 5days ago is it ok to set a timer on the fan so the fan turns off for 5hours when its dark then comes on 2hours b4 lights come back on? i guess it would be wise to keep the fan on when the plants are buddin but they wont be for a few weeks so wont hurt will it?? :rasta:... pps heres a pic of my unwanted males.. but i planted double seeds so all is good:dance: Rating: 5