I'm no expert and nor am i in any authoritah to give advice.
I'm doing a pc grow now too. I''ve documented myself quite a bit before i started and i can tell you from personal experience what to do/expect.
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first use the bigger pc case for flowering( havent flowered yet, but i''ve heard you need space, the more the merrier)
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second: for ventilation install pc case fans (you hook the up to a 12v DC power source )
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third: dont try to make or use a carbon scrubber as you will fail, pc fans dont have the power to suck ENOUGH air through enough carbon( so it can work properly). just buy and air Ionizer
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forth: light will leak out of your box unless you are prepared to really work on it (I.E. use like 3 rolls of ducktape and aluminium foil )
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fifth: to put the lights in, just solder some wire to CFLs parallel attach them (
http://en.wikipedia.org/wiki/Series_and_parallel_circuits) . if you put the in series they wont work, trust me or read the damn article, beyotch.
to attach the lights just drill holes in the roof and tie the with some metal wire ( worry not for it works fine )
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the top part of the pc will get warm. MAYBE even hot if you dont vent it properly. i have 2 80mm fans in front( where the cd/dvd was ) and it sucks enough air to keep my box at 29 celsius ( 26 celsius in the room ) .
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sixth: dont expect it to be quiet. it doesnt make huge noise but people can hear the fans working ( just hide it in the attic or basement, somewhere people dont enter or where there usually is some ambient sound)
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eight: you know how they say move the light to be 3-4 inches above the plant ? move THE PLANT to the light not vice-versa . it''s easier, just put a stack of books underneath until the little plant-plant grows enough
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ninth: ScrOG or SoG is the way to go . ( that is Screen of Green and Sea of Green , google if you dont know what it is ) a normal growing plant won''t have enough space to properly grow, i'm going for scrog as i like challenges
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tenth: get an ionizer and a power socket with a timer, they will really help you .
these are my only 10 tips i can think of right now. Don''t bash on me people i''m a noob too
You underestimate the Vigor of the marijuana Plant. <3 You will run into these issues if not all ::
Not enough Lighting causing stretchy plants w/ little growth.
Too much lighting to the point you need to keep the side off to vent the heat
Too much lighting that it takes up most of the space the plant would need to occupy
Trial & Error to get the correct plant size, you won't nail it on the 1st try.. you'll have to go through having a plant being too big.. or too small before you get it right.
If it ever made it 50% into bloom you would *hopefully* have smell issues, & that little box would only seem to radiate it.. Like a nice marijuana oven.. mMmmm
&& I believe if you were to ever get a mite infestation in their it would get ikky.
i dont know about smell yet, but my 2 fans keep 4x20w CFL+15 w CFL at 29 degrees celsius.(had 2 more installed today w00t)
i would advise reading reading reading and reading some more before you start, my first time was a fiasco. My plant stretched( noob only used the 15w CFL) till it fell to the ground, after which i read that you can replant to correct this( DONT DO IT IF YOU''RE NOT SURE ABOUT YOUR DEXTERITY) and ripped half of my root system=> dead plant.
go for 24h vegging for 2 weeks at atleast 100w then screen of green it .
