Van Omen

Cool. I'll get these girls under 250w the hps asap. My cab isn't going to be very big though. The largest I'll build it will be 3' wide x 3' deep x 5' tall. It'll probably be a little smaller.

I've got some mexican bat guano that I've been saving for thier first feeding. That stuff will give a super burst of nitrogen, and hopefully lower the ph a bit.


How do you make sure that the water you are using is at 6.0? I know you can test the ph of the water, but if it is too high or too low, what do I do to adjust it?

ILLEGAL-SEED

even a 250 is a bit small. dont get me wrong it will work, but a 400 in that spot would be much better. 3 by 3 isnt too small. what i meant by small was grows you NEED to use cfl's. you got plenty of room for hid lighting.

you can check your water with a ph meter. usually 70-120 dollars for a bunch of good ones.

to adjust it, you use ph up and down. each nutrients company almost has thier own version.

i use general hydroponics ph up powder, and it averages out to like 8 dollars a year.lol stuff will last forever.

Van Omen

I'm thinking ventilation now. My final cab dimensions are

Will a 60 cfm fan in with an 4" tube for out take, and an open 8" tube up to an open window be good enough for this size or am I gonna need a mo powerful fan?

I tried to calculate it in the noob guide but I suck at math.

Van Omen

Is it better to water my plants as soon as the lights turn on, mid day, or right before the lights turn off?

What do you prefer and why?

I'm 18/4 cycle right now.

nigel

so not much help with such equations sorry; will put it on my homework list to find you some info though.

i like to water mid morning, lights on being morning and off being night.

the pots are warmed up, so plants looking for something to do with their day, are 'awake'.

morning rain means they have all day to use it;

any spillages on foilage can dry out, less chance of mould and excessive night humidity,

you are not putting water on a hot plant shocking it,

jobs done leaving rest of shift for other chores, can see results by end of shift.

ideal temp of water according to MattD is 22 degrees, i do not have a thermometer, but try and have the water warmer than freezing.

[do not put a 20 litre plastic container close to fire to do this; they melt] lol

morning is a good time to spot and catch any critters disturbed by watering, about my resoning, oh, it's nice to sit there in the morning, dampness in the air, watching the plants grow, whispering 'thankyou for breakfast Nigel'. lol nigel

__________________
"There are no problems; there are only solutions." Bill Mollinson

nigel

any advice on my ventilation, by Ashmore 11, Planting Indoors; construction.

few figures and stuf that might be of use. have bumped it for you so it is near the top of list. good luck nigel

__________________
"There are no problems; there are only solutions." Bill Mollinson