you should try a good flush. also if your res is small you should consider a larger one. take baby steps - in any system the ph usually moves one way (mostly up) so you should only have to adjust downward. if you are adjusting both ways you might be working against yourself. i hope this helps...
you dont want to just put the top branches through or else you defeat the purpose of a scrog. i would start the screen four inches below the top of the plant and start the weave pattern with the top 4" the rest of the plant will catch up in the stretch. good luck
i think you will be fine without a filter but the next time you have money to invest on grow goodies i would consider one. to reduce the paranoia of odor $150 bucks is nothing. also odor is more of a problem with some people than others because of different circumstances like distance from...
propane burns consuming O2 and produces CO2 therefore you need a supply of oxygen or your propane cannot burn. my first idea would be to enclose the burner in a metal cabinet (don't use wood it will burn) with holes in the top equipped with downward facing fans to force O2 into the chamber then...
i think two 400s will be a good amount of light for your area but i think 20 plants will generate too much smell unless you use a good carbon filter. they have them on e-bay in packages with fans. you get ventalation + heat and smell control two birds with one stone.
also the three bulbs for three 4x4 sections would work nicely for a 3 week perpetual harvest which i assume you are shooting for with the two veg rooms and one big flower room. each light could be raised or lowered so that the latest cycle of plants would still be as close to the lights as the...
you will need room to walk in 2 X 12 which leaves you with 4 X 12 grow area . 600W bulbs are good for a 4 X 4 area so three 600W lights hung in a line to make ductwork easier is your best option. still if you have the money and are not worried about heat and electricity consumption more light...
240V X 15AMP = 3600W?
3600W X .8 = 2880 = more than enough to run 4 X 600. I think you still should check with one of the electrical gurus on here just to be safe.
im not a professional but i think the most wattage you can run on a 15amp circuit on 110V safely is 2000 but with 220 or 240 you can run more which would probably cover the 4 X 600. i would also recomend that you use two dual ballasts as opposed two four single, just my opinion. good luck i...