400W Alaskan Thunderfuck SCROG

@woodsmantoker - bigger scrog... hmm... I like the way you think! Considering going the edibles route and would certainly need more plants.

Right now it's reasonably under control, the stretching has slowed way down, buds are fairly well distributed.

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Notice the tilt to the screen, both sides angle toward the center of the cabinet slightly.

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Been a while since I posted anything here, a couple of pics are always nice. Seems to be some interest in my cabinet, honestly I've changed it some but based on feedback I'll do a build thread on it with all the gory details.

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edit: that's one of two 2 sqft screens - 37 days in flower
 
It's been pointed out I've been remiss in describing mods during the grow, here are a few; added two small intake/circulation fans (80mm PC fans) to the clone/mom room, added small exhaust fan to the utility room (110mm PC fan), added a stand to raise the canopy closer to the light and reduce stretching, built a cooler/heater to control flower room environment better, moved the air pump to the utility room in order to pump warmer air to the reservoirs (works great!), reduced the nute levels in the reservoirs (the rock wool cubes were staying too wet), added an intake fan to aid the CO2 enrichment, added a second circulation fan to the flower room.
Just a little "tweaking" either for convenience, optimization or (my wife would say) "obsessive puttering". The next generation cabinet will incorporate some changes to correct the flaws though overall the cabinet has exceeded my expectations. The biggest problem in this grow so far is underestimating this strain and over-growing my space, there are more than 25 bud sites/ sqft in the screens currently. Fortunately they are in various stages of maturity and a staggered harvest appears likely, we'll see how it goes over the next 4 weeks or so.
 
What is the utility section for in your grow box? For supplies?

Also does that air duct pulling air into the mother chamber pulling air in and then the air goes to the flowering chamber and then finally out through utility? Is that how your ventilation is set up?
 
The utility room houses the air pump, timers, and ballast. The ducting is setup as follows: the cooltube (light) is ducted separate from anything else, it's closed off from the grow box. Fresh air comes in through the mom room via a small intake fan, into the flower room then out. There is also a 4" forced-air intake in the flower room, it all gets pulled out by the main exhaust fan in the utility room then pushed through the carbon filter.
 
ScrogThis said:
The utility room houses the air pump, timers, and ballast. The ducting is setup as follows: the cooltube (light) is ducted separate from anything else, it's closed off from the grow box. Fresh air comes in through the mom room via a small intake fan, into the flower room then out. There is also a 4" forced-air intake in the flower room, it all gets pulled out by the main exhaust fan in the utility room then pushed through the carbon filter.
Click to expand...


Nice grow box, I was thinking of constructing one similiar except with 1 mother plant and 1 or 2 flowering plants.

Any guides on how to setup hydroponics (bubbler) just like yours? Im looking at just setting up 2 plants and not 4

Can you please tell me where those tubes with the lime green wrap around goto in the hydro chamber and where they come from?

And what are those milk jugs for?

Sorry for all the questions thanks alot man.
 
Nice grow box, I was thinking of constructing one similiar except with 1 mother plant and 1 or 2 flowering plants.

Any guides on how to setup hydroponics (bubbler) just like yours? Im looking at just setting up 2 plants and not 4

Can you please tell me where those tubes with the lime green wrap around goto in the hydro chamber and where they come from?

And what are those milk jugs for?

Sorry for all the questions thanks alot man.
Click to expand...
No problem! I'm using a SWC (shallow water culture) ScrOG, allow at least 3 gallon capacity for each plant. I use a really big piston-style air pump connected to air stones (whatever variety you like) to really boil the hydro solution. More air = better roots, they would start to rot quickly w/o it.

The netpots are 5" and filled with hydroton to hold the rock wool cube they were cloned in. I just cut out the holes in the lid and put a spot of hot glue in a couple of spots to hold them down. The tubs are painted black on the outside to minimize algae growth, I used that Krylon Fusion spray paint for plastic.

The screen frame is made from pvc pipe and the legs slip down into the tub to sit on the bottom. They unscrew from the frame for storage in the tub when not in use. I drilled holes 2" apart all the way around and used nylon string to "make" a net. Much easier to remove at harvest plus no mold or rust.

The lime green things are actually just plastic fittings that connect the air stones to the air lines in the cabinet, they go to the air pump in the utility room. Makes it easier to take the girls out to work on them.

The milk jugs are a 4 gallon sugar/yeast CO2 generator for CO2 enrichment, when I hooked that up they took off like a race car!

I've been meaning to do a build thread on the cabinet ( I have tons more pictures) but let me know if you have any questions.
 
Truly impressed here ScrogThis, I've only grown once myself a couple years back. I had a general idea of what I was doing, but after seeing what you've put together here........well, you have inspired me to start my own ScrOG grow/cabinet. Do you think I would be able to sub a 150watt MH(during veg) then HPS(during flower) in place of a 400w? Maybe just bring the ladies closer to the light? I was hoping to use a 150w and 4 3' T5's in the flower chamber. Seeing how electrical use, as well as heat(fear of fire, lol) are issues, as I rent and don't need my landlord asking why their electrical bill skyrocketed lol. Thanks in advance, and again, great work bud. Also, if you could post a couple additional pics of your box(fan locations and such), and what type of circulating fans do you have and how did you mount them. Any help is greatly appriciated.
 
That looks great!

I'm thinking of doing SCROG as well, but me and my buddy really want the plants to be massive, so we're thinking of giving them 2 months of veg time... Which makes me think that SCROG wouldn't be possible - especially with +30 plants, also if we're going to top and fim them....

Keep up the good work!
 
Do you think I would be able to sub a 150watt MH(during veg) then HPS(during flower) in place of a 400w? Maybe just bring the ladies closer to the light?
Click to expand...
I used a 400W MH for veg and switched to the HPS for flower, if you can only pick one I'd choose the HPS as it's adequate for veg but better for flowering (see graph). How big your light is depends on a few other things also: how many plants you have (the area you need to cover) and your grow method (how far the light penetrates into the canopy) to keep it simple. Your reflector will affect your coverage area to a great degree, if you don't have a light meter use a dark colored piece of paper and hold it at various locations/distances to "see" the coverage area, you can tell pretty easily where the intensity drops off at the edges. A 150W lamp is fine up to about 12" away before the intensity drops below "optimal" but closer than that and the coverage area is smaller and heat starts to become a factor, it's a trade off. Adding CFLs or additional smaller lamps may help but it also depends on your specific situation.

Sunlight.nm-range.jpg2238946976_15cce6dd1c_b.jpg (these images are not mine, credit to original poster) I've collected a lot of info over the years but I can't recall where these specific images came from, apologies.

Hope that helps, I'll post some detail on the fans and such in a bit, errands to run.
 
ScrogThis said:
No problem! I'm using a SWC (shallow water culture) ScrOG, allow at least 3 gallon capacity for each plant. I use a really big piston-style air pump connected to air stones (whatever variety you like) to really boil the hydro solution. More air = better roots, they would start to rot quickly w/o it.

The netpots are 5" and filled with hydroton to hold the rock wool cube they were cloned in. I just cut out the holes in the lid and put a spot of hot glue in a couple of spots to hold them down. The tubs are painted black on the outside to minimize algae growth, I used that Krylon Fusion spray paint for plastic.

The screen frame is made from pvc pipe and the legs slip down into the tub to sit on the bottom. They unscrew from the frame for storage in the tub when not in use. I drilled holes 2" apart all the way around and used nylon string to "make" a net. Much easier to remove at harvest plus no mold or rust.

The lime green things are actually just plastic fittings that connect the air stones to the air lines in the cabinet, they go to the air pump in the utility room. Makes it easier to take the girls out to work on them.

The milk jugs are a 4 gallon sugar/yeast CO2 generator for CO2 enrichment, when I hooked that up they took off like a race car!

I've been meaning to do a build thread on the cabinet ( I have tons more pictures) but let me know if you have any questions.
Click to expand...


I understand that you say better roots with a piston style air pump. I have a ELITE801 air pump laying around and it only has one outlet. Heres a link to the pump I have. http://www.animalworldnetwork.com/hael801airpu.html

Will this air pump be enough to supply 1 of those bins with enough air without rotting the roots? Also this pump only has 1 outlet, is that enough for 2 plants?
 
Hard to say as they seldom provide a rating for volume or pressure, I was using two of these pumps one for each tub but they just didn't put out enough air in my opinion. In a SWC I want the hydro solution to literally boil with air producing a mist in the reservoir. Hook it up and see what it does, if you think it's enough it probably is. Good luck!

edit: I still have them just in case the other goes out, no air in a static hyrdro reservoir is bad.
 
Bud porn! A few pics for your enjoyment, 3-4 weeks to go - 48 days flowering

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Bird's eye view of the screens while I had them out of the cabinet

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