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Hola all, After wrestling with the idea for several years, I have decided to give organics a try. Coming from chemical/salt hydro and I just can't bear the thought of continuing to use that horrible stuff, knowing where it comes from and where it ends up. Plus from what I read organic buds...

Hello there, Can anyone tell me what kind of deficiency this is? It's happening to the fan leaves, from the bottom of the plant and making it's way up. 3 weeks old, 24/0 Hydro (DWC) 1000w HPS Temps 20C (night) - 25C (day) I thought it was a calcium deficiency. I checked the pH and it was high...

Hi all, If I'm pulling air from outside to cool my cooltubed 1000w HPS, and it's getting mighty cold outside, how cold until it isn't safe? Will the bulb shatter if the intake air is below 0? Below 10? Thanks!

Folks, I'm looking for a tent that will fit a vertitube, so one that's at 8ft high. Secret Jardin and Growlab are too short. Any other brands?

Hi folks, I am looking for something to build a vertical system with, and I can't find the right material. What I need is pipe/hose/tubing 6" diameter. 1. It needs to be clear, I will be wrapping it with reflective thermal insulation so light in the rootzone is not an issue. The reason I...

Is there a fixed "mapping" of roots to sections of the plant? What I mean is, for example if you were to cut off a particular section of root, would a certain part of the plant die, or would the plant just generally suffer a little, as the overall root mass tries to now support a plant that is...

Hi folks, What would it take to yield 1oz+ per plant in a zero-veg clone-fed SoG? 4 plants per sq ft. Clones get a decent set of roots and go directly into the flowering room under 12/12. So far yields have been kinda dissappointing, but the plants look very healthy so I don't think I'm...

Hi all, Can I get some experienced opinions on the best kush, or kush cross, to grow in zero-veg clone-fed Sea of Green? We're talking lots of small plants (4 per sq ft), basically as soon as they get a decent set of roots in the cloner they go right to 12/12 in the flowering room. What I am...

Hi everyone, As some of you may know, I am looking into a sealed room grow. Full environmental control, CO2 supplementation, etc. I have heard that starving the plants of CO2 during the beginning of flowering will cause them to grow bigger buds, because they are producing more stomata in an...

Hey all, Trying to design a sealed room. Cool-tubed lights to control expel thermal heat coming from HIDs. CO2 tank to bring fresh CO2 without generating heat. Carbon scrubber to get rid of odour. And I thought I had the temperature problem solved by going with a dual-hose A/C (with...

Hello folks, Can I use a fan to cool the temps in my res to below ambient temp? I don't mean like blow across the water surface, I mean blow air along the outside of the res. To be more specific, my res is isolated in a small insulated box just slightly bigger than the res itself. If I put an...

Hey all, Ok so let's say I have a 5x6 hydro table (dwc, aero, e'n'f, doesn't matter) inside a 10x10 bedroom, so I have plenty of access around the edges to trim, inspect, etc. Now obviously, there is going to be panda film on all four sides to maximize the light landing on the plants. So...

Hi folks, I have a questions about those portable A/C units, the ones that have two ducts (intake & exhaust) to the window. What I'm wondering is, do they exhaust the air from inside your room? Or do they only exhaust the air that they bring in from outside? The reasons I am asking: 1. I want...

Hi folks, Just wondering if anyone is using a medical oxygen concentrator to crank up the O2 in their reservoir? I was thinking of maybe getting one, and putting in near my fresh air intake, and directing the output over to where my air pumps are. That way you extract the oxygen from the...

Not sure if this should go in Grow Room Design, Indoor Growing, or Advanced Techniques, so feel free to move this if necessary. I am looking for environment monitoring devices that can be hooked up to computer via USB. Things like thermometer (with remote probe, like a long wire thingy)...

Hey all, So a quick intro, I have a DWC system in a spare bedroom using 12 storage totes, 2x1000w HPS, cooltubes, Adjust-A-Wings, etc. For my next set up, I would like something that is less maintenance. The problem with DWC is you have to use a buttload of nutes, a buttload of water, a...

Hi folks, I am in week 5 of an 8 week flowering cycle. This is indoor, sort of following Al B Fuct for perpetual SoG, but doing DWC instead of E&F. My pH is quite stable, I check it daily if not twice daily, never outside of the 5.5 - 5.8 range. Temperatures are also quite stable, 18c (65f)...

Hi all, I harvested a few days ago, dried the buds in a dryer till they were quite crispy on the outside. Then placed them in a tupperware in a cool, dark spot. Overnight they have re-wet, so I guess the moisture from inside the bud is coming out. The thing that worries me is that they smell...

I am having major problems with PM in my spare bedroom grow. Is a sulfur burner supposed to actually fix PM, or is it just preventative? Is there anything else I can try in my sulfur burner, like neem oil or something, to attack the PM? Should my circulation fans be on or off during sulfur...

Hi all, For a grow in a bedroom in an apartment building, I need the window for intake and exhaust of my air-cooled lights and my portable A/C. Plus a large passive intake to draw fresh air into the room, which is being exhausted via a centrifugal fan pushing out the bathroom exhaust (with...