its more for the fan your rooms L X W X H = room cubic footage, many will want a fan that can move the air 3 times a minute
so my veg room is 4 X 4X 8 = 128 a 400 cfm fan will do it nicely
if you have a lights out time and REALLY want to shut it off you can while lights off for a bit.
but the exhaust is taking air out of your room wich causes fesh air to come in brining C02 and your plants need it to grow.
Truth hurt, your funny calling me names like i care, just proves you dont know what your talking about.
and as it appears everyone knows it but you.
So So Funny.
you have no idea what your talking about. many many experienced growers know you need to add one table spoon of Dolomite lime per cubic foot of dirt
to help maintain and even soil PH.
your are not knowledgeable enough to be giving advice.
stop hurting ppls grow, you are the moron.
i just mentioned in another thread that PH was very important and this guy got upset and sarted this thread. LOL
im glad to see there are ppl here who know the deal.
this is silly.
grow a few different strains and you will see PH is as important as your light.
have i seen a strain where ph was less important, yes, i have seen many strains where it is very very important, for sure.
I plan to smoke plenty this year.
But your only 19, seems like its a good idea for you to cut down if you feel it neccessary. good for you.
you have a lot of time to get high, get your life together and then you can puff your brains out.