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No issues there, just adding more light. Use the cfls as side lighting to get a more even spread of light around the entire plant, as a 150w CMH won't penetrate the canopy very well (but still more so than cfls).

UV-C is what is used to sterilize, not UV-B. http://en.wikipedia.org/wiki/Ultraviolet_germicidal_irradiation#Water_sterilization

30% or higher food grade h2o2 (hydrogen peroxide) will sterilize your res, and won't do anything but oxygenate your plants roots. I'm also betting its cheaper, although I haven't looked at hydrochloric acid prices.

With the way he's talking about building the tables, he made it sound like he will have limited access to open the res, and thus required some way to mix the res.

For large reservoirs, use submersible pumps, not connected to any tubing, to circulate water in the res. switch it on when you want it mixed. Water weighs a lot and the table and res need to be able to hold up to it, so fiberglass would be a good idea. Keep light proofing and good drainage in...

I'll agree with you on most points, but the "pigments" that cannabis uses to protect itself from UVB aren't "pigments", they're trichomes, the little things we love because they produce THC. It's been shown that plants grown under higher UVB levels put out more trichs to defend themselves, and...

Stop by the advanced cultivation section. There's a few threads on this topic. https://www.rollitup.org/advanced-marijuana-cultivation/403595-how-easily-graft-marijuana-plant.html From what I've read, yes hops can be grafted onto cannabis stalks, and vice versa. However, it will only continue...

24/0, 20/4, 18/6 etc will all keep a plant veging, allowing you to grow the plants as big as possible by giving them more time to grow. This can mean a higher yield at the cost of more time and electricity costs. This means you can grow less plants and still get a high yield off larger plants...

Mixing spectrums is fine. The more light the better, as long as it's in a usable spectrum.

Just imagine a dying leaf falling off your plant and right onto the candle flame. Poof, grow gone, firemen at your house and the fire marshall investigating how the fire started... Bad idea, stick to yeast if you need cheap co2

No Problem. ;)

Go to walmart and look for 2700k 25w/26w CFLs. They have them for like $2 for a 3 pack at the walmarts near me, usually on the bottom shelf. The packaging looks like THIS. Get 2-3 packs and get them set up in there along the top and sides of the plant. With these you should be good for 1-2...

Pompous asshole here: Typical black lights, the purple-looking ones, also called black light blue bulbs, put out mostly UVA, with a tiny bit of UVB if you're lucky. As far as I know, UVA doesn't do much for your plants, as it isn't even strong enough to give you a sunburn if sat under for hours...

I haven't used mylar, just em blankets. I noticed that the em blankets I got from walmart are actually quite translucent (they let light through), so I'm betting that mylar would work better. However, for $3 for a huge sheet, the price is definitely right compared to the mylar covered...

I've got 2 plants at 2 weeks in flowering that I've done some light LST on. Is it too late to pull off any small bud sites around the bottom? Lucky me I got 2/2 females on my first grow from some "Daywrecker" bag seed! :clap: Stuff was some of the stinkiest shit I've gotten, and it knocked me...

its the chinensis genes in the plants showing themselves. chinensis (named because the species was from asia, mainly china) was an early species classification (like indica or sativa) that isn't widely recognized anymore, but sometimes this characteristic pops up in a pheno...