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The first thing you want to get right with your grow box is the ventilation. The hot spot created by a light bulb in a small space becomes more of a percentage of the cubic meter volume than in a large grow room, so for this reason in mind your vent fan will have to be very powerful. For...

If the air is sucked from the tent and exhausted into the tent you should have a neutral atmosphere so you'll be fine, no positive expulsion.

Try this instead... 3/4" thick x 4' x 8' foam insulation board with a reflective mylar "hammered" finish. Polyshield is the brand name at the big orange store. Use flex-fix brand flexible (also reflective) duct tape to seal the joints. This tape is the exact same material as the reflective mylar...

Chelated dipotassium polyaspartic acid is the pH perfect ingredient. When this solution becomes available in amounts less than a shipping container ( i.e. a boxcar) just add it to you reservoir to the tune of 10 ppm, and you will have a pH perfect formula when I feel like giving up the generic...

Cut it off, then with a pair of pliers (side cutters) or a razor knife you make a slit down the middle of the cable , parallel with the cord, about 3 inches down. Don't worry if you slice through some of the underlying wires. After grabbing the the slit open outer insulation with your thumbs...

The amount of time you burp is relative to the resin content and relative humidity of the curing environment. What's the RH gonna be like?

You crack me up.

Soon as you see the second pair of leaves (not including the embryonic set) go with 1/4 strength. I wouldn't wait much longer otherwise you will leach them a bit and as a result they get a slow start. Ditch the grow and just use the micro and bloom. If your water is close to hard (120-199ppm on...

They look like female pre-flowers. Nothin' serious...only buggin'.

You have a nice set-up. Don't veg them too much. 6-8" is what you want. You'll get too much undergrowth (popcorn) and the kind of trim work that goes far past the point of diminishing returns. They will easily grow to 3-3 1/2 feet from 6-8" at flip time (the time you initiate 12/12 light cycle)...

How's your tap water? You may be just fine with that. If it's soft (under 200 ppm) you could use it after shaking it up with a little pump overnight just to make the chlorine escape. You may not even have enough chlorine in your water to pose a problem. You could even download a water quality...

I always found it funny that there is this misconception about strong (read:effective) pyrethrin miticide. Me ...personally, I like to classify it as organic. The active ingredient is derived from african chrysanthemum. Pyrethrin extraction is an organic chemistry procedure. It is a funny thing...

Yeah, if your ppm is below 200 there should be no problem mixing it with a run of the mill grow/micro (lucas) formula. GH considers water to be hard after 200 ppm so you should be fine. Not that you can't strip it down to near 0 ppm and reconstitute to your desired hardness (most fertilizers...

Stop using the intake fan. It is not necessary. You simply leave the appropriate sized holes ( in your case 2-6" intake holes or 1-8" hole instead of a 6"hole with an intake fan) open to allow the extractor fan to be passively fed. You will defeat the negative air pressure effect that is...

Use the led for clones and veg. For flowering go with something stronger or you'll get plenty of lanky stretchy growth. It's a valuable fixture, just not for flowering.

If you mean 1", that's good if your not going higher than 2 feet. I would go with the 1/2". I like the 1" (25mm) for 900gph or more. You can google the performance curve chart for quiet one (brand name) pumps and you'll get a good idea of what diameter is compatible for which pump. Just as long...

All of kanx advice sounds right, just not the 4" intake. Never use a fan to blow air in because even though the intake fan is sized smaller than the exhaust fan, when the static pressure loss from the carbon filter is factored into the exhaust output there is a good chance the 4" intake could...

The hortilux blue 400 watt metal halide comes in a vertical version.

Also keep in mind when testing soil pH, it is best to test the run off water that was in contact with the organic soil and least favorable to test the soil pH via probe. Opm has it right.

Definitely try to keep them going. This might sound strange, but it's a great learning experience when you make mistakes in the beginning and not after so many weeks of flowering. You probably already thought of this, but if you can , hedge your bets by getting some new clones properly potted...