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Got you beat with 150,000 for 5 plants :mrgreen: But lumens are a horrifically shit measurement of lamp output when it comes to plants; it's almost meaningless.

The insulation will be fine. If you kick it around, trample on it or disturb it at all you'll end up with a lot of dust in the air, so that's about the only thing to worry about. I'd also recommend a grow tent. When you set it all up, try not to disturb the dust up there too much. I don't know...

Good thread. Although, I'm not sure about a few details. For example, chlorophyll is quite a big molecule. I've been having trouble getting information on it, but it seems to melt at around 100C+, which would suggest it has a boiling point higher than water (it also seems to decompose on...

I just read that start to finish, some of the replies are so funny the way they're worded Although I don't remember sugars containing nitrogen, they're carbohydrates after all The most logical reasoning I thought was the one of light breakdown; since that's chemically proven. Although...

Using a pump with drippers might be a plan, although they easily drip quickly enough with the gravity setup to have it turning into a puddle under the pots. The only gain would be the time control. I'd go for sprayers because, if you have a good free draining media (which you'll want to...

good warning, but it should also be possible to create some shaded cool space by foiling up an area near an air intake. maybe you could make a mini drying enclosure with a cardboard box the incoming air has to blow through? you could even put it outside the tent, so long as the air goes through...

thanks for this thread. i was considering water curing some Hawaiian snow super strain thinking it'd be insane (oil is meant to be 23%), but now i've heard it tastes like ass, i'll just dry the shit normally... besides, I doubt it needs to be any stronger than it already is

the blue was probably used to hide imperfections in the glass or something like that. blue isn't a safe color to store photosensitive things in. chemical suppliers use brown tinted glass for virtually everything to avoid sunlight getting to it. it's called 'actinic' glass sometimes. i think...

Seems something is up with your nutrients or pH given the yellowing on some of them. It could be a touch of nutrient burn. If you're using nutrient, try backing it off a little.

Dry inside your tent whilst vegging?

This is just a heads up to those who've not tried it. I've been growing on coir and decided it'd be cool if I could just set my system up to drip through all day while the light was on. But man... those drippers are a pain in the ass to get running smoothly! I think mine are from All Season...

From what I can find so far, it seems chlorophyll synthesis is actually stimulated by some band of light from the normal blue chlorophyll peak to somewhere in the middle of green, which is thought to be due to carotenoids. Remember that despite being orange / yellow, carotenoids actually absorb...

I know there are accessory pigments, but they're usually swamped by chlorophyll A, which is by far the most dominant pigment in most green plants. I agree that the second graph looks more realistic; it's basically chloro a & b with carotene. I spotted that. What bothers me is the weighting...

I've been doing a ridiculous amount of reading around photosynthesis recently and noticed something. A lot of hydroponic sites show the following graph (or something very similar), which is from the Sunmaster website; Here is the spectrum for chlorophyll (b is similar and the carotenoids...

I don't know if it's already been said, but I think GA3 encourages your plants to change sex. A lot of the growth hormones are similar in structure, so it's possible they may do similar things. None the less, I'll be interested. I have about 5g of GA3 that I've not been using in a drawer...

Until you get more used to setting up and working with hydro, I'd just buy a carbon filter. They definitely work! The air leaving it will smell of absolutely nothing, after a few hours in a room the room will be similarly void of any smell and probably smell cleaner than most rooms you've been...

You're right :finger: :bigjoint:

Not sure about the UVA thing. Almost all UV lamps output more UVA than UVB, the mercury vapors I'm talking about output about ten times more UVA than B. There'll no doubt be things you can put in front of the light to get rid of it. But I'm not sure if we have to. Everyone is assuming we just...

The help I've received on the ballast question for mercury vapors hasn't been great. I am going to take a guess that a HPS ballast will work for <1kW mercury lamps and that you need an ignitor for >1kW. I've discovered some interesting facts regarding mercury vapors and their cost compared to...

I'm guessing that's the seed rather than the UVB as well