1800 watts Sealed and CO2 Enriched."A Teachers Learning Process"

Snafu1236

Snafu1236

Well-Known Member
Yeah they're sold out. Grabbed some Critical mass from Mr Nice Seeds for next fall.

Been trying to get some Cali Connection Tahoe OG regular gear for a while, always out of stock. That stuff is awesome, I've grown it once before.

I can never seem to get OG Raskal's gear before it sells out. It sells out every time before I can purchase.
 
Snafu1236

Snafu1236

Well-Known Member
Hey Shrubs,

I am trying to send you a PM, but your inbox is full. I got a question for you, and feel free to PM me the response if you don't want to answer it here in your thread.

Hey Shrubs,

So recently I am updating my grow room. I am going ahead with a 7' tall, 8's long and 5' deep grow tent, which is an upgrade form my separate dual 4x4 tents.

I will be daisy-chaining 2 600W hydrofarm daystar air-cooled hoods for ventilation/cooling, using a 6" vortex 449 cfm fan.

Normally I used one 600W per tent, linked to a carbon filter to pull smell from tent, cool the light, and exhaust outside the tent.

Now, with two linked together(I know you have alot of experience doing it this way), I am running into some questions.

My question is this:

1. Do you recommend attaching a carbon filter to this setup(2 hoods), or do you think it will be too much load on the fan for such a large tent.(even though the 449cfm can handle an 8x5x7 tent)?

2. Is it more efficient to have the 6" for exhaust only, and have another, smaller fan doing odor control from pulling a carbon filter from within the tent?(this seems like a better option to me)

3. I am going to use the two 600W HPS hortilux eyes, but probably supplement with a few panels or UFOs of LEDs. Currently I have two 90W flowering lighthouse hydro UFO and a 240W blackstart LED panel. Aside from the LED heights, what would you recommend for a proper distance of the two 600W from canopy? Also, how far do you think they should be apart? I figured an equidstance from eachother in relation to the tent, but I would like to hear your input.

4. Any other recommendations or concerns you may have woiuld be appreciiated. Normally I do much smaller scales, but I am doing it in a bigger tenet now becuase it will just be so much more efficient.

Thanks to you for your response! I look forward to hearing from you.

_Snafu
 
Someguy15

Someguy15

Well-Known Member
Snafu1236 said:
Hey Shrubs,

I am trying to send you a PM, but your inbox is full. I got a question for you, and feel free to PM me the response if you don't want to answer it here in your thread.

Hey Shrubs,

So recently I am updating my grow room. I am going ahead with a 7' tall, 8's long and 5' deep grow tent, which is an upgrade form my separate dual 4x4 tents.

I will be daisy-chaining 2 600W hydrofarm daystar air-cooled hoods for ventilation/cooling, using a 6" vortex 449 cfm fan.

Normally I used one 600W per tent, linked to a carbon filter to pull smell from tent, cool the light, and exhaust outside the tent.

Now, with two linked together(I know you have alot of experience doing it this way), I am running into some questions.

My question is this:

1. Do you recommend attaching a carbon filter to this setup(2 hoods), or do you think it will be too much load on the fan for such a large tent.(even though the 449cfm can handle an 8x5x7 tent)?

2. Is it more efficient to have the 6" for exhaust only, and have another, smaller fan doing odor control from pulling a carbon filter from within the tent?(this seems like a better option to me)

3. I am going to use the two 600W HPS hortilux eyes, but probably supplement with a few panels or UFOs of LEDs. Currently I have two 90W flowering lighthouse hydro UFO and a 240W blackstart LED panel. Aside from the LED heights, what would you recommend for a proper distance of the two 600W from canopy? Also, how far do you think they should be apart? I figured an equidstance from eachother in relation to the tent, but I would like to hear your input.

4. Any other recommendations or concerns you may have woiuld be appreciiated. Normally I do much smaller scales, but I am doing it in a bigger tenet now becuase it will just be so much more efficient.

Thanks to you for your response! I look forward to hearing from you.

_Snafu
Click to expand...
I can help some.
1) I am using the same exact fan daisy chaining a carbon filter, 2 thousand watt hoods and a 600w hood. Works fine, although I should add the 600w doesn't run at the same time as the 2x1000w. You lose more CFMs through flex duct, esp sharp angles, than you do through hoods. As long as your filter is larger than the fan rating you should be fine, mine is Phresh rated at 550CFM.

2) 2 fans are better then 1 yes, but that's double the electric draw and double the noise, if those considerations don't matter, dual fans will work better. Also consider if you do this, your exhaust may be too powerful causing your tent sides to be 'sucked in' due to negative pressure...which may require the addition of a intake fan to balance the pressure.

3) I'd go with equidistant, or maybe a touch closer together if you want to increase penetration. As for height, I know shrubs will say 2-3 ft, but I'm more of a 18" kinda guy lol This is really debatable and totally up to you.

4)Not much else except the fact that you might need an intake fan possibly depending on negative pressure in the tent.
 
Snafu1236

Snafu1236

Well-Known Member
Awesome...you are helping me solidify my decisions. Shrubs, I know you hate explaining your method for light distance, but I could use a refresher and know that it would help anyone else that may see this thread...
 
Shrubs First

Shrubs First

Well-Known Member
Snafu1236 said:
1. Do you recommend attaching a carbon filter to this setup(2 hoods), or do you think it will be too much load on the fan for such a large tent.(even though the 449cfm can handle an 8x5x7 tent)?

2. Is it more efficient to have the 6" for exhaust only, and have another, smaller fan doing odor control from pulling a carbon filter from within the tent?(this seems like a better option to me)

3. I am going to use the two 600W HPS hortilux eyes, but probably supplement with a few panels or UFOs of LEDs. Currently I have two 90W flowering lighthouse hydro UFO and a 240W blackstart LED panel. Aside from the LED heights, what would you recommend for a proper distance of the two 600W from canopy? Also, how far do you think they should be apart? I figured an equidstance from eachother in relation to the tent, but I would like to hear your input.

4. Any other recommendations or concerns you may have woiuld be appreciiated. Normally I do much smaller scales, but I am doing it in a bigger tenet now becuase it will just be so much more efficient.

Thanks to you for your response! I look forward to hearing from you.

_Snafu
Click to expand...
SG15 hit em all on the head, I'll just add a few words.

1. Your fan should cool the lights no problem. Yes a carbon filter is necessary if you are trying to control smell. My hut stayed very well
concealed as far as smell goes until I opened the zipper.

2. I had separated ducts. One going straight through the lights and one exhausting out the top. If you recall though, in the very beginning
I also had a separate intake coming in direct from outside, this was until I bought a window unit airconditioner and just cooled the room
the hut was sitting in. Basically the room the hut sits in acts as a lung. The hut exhausts heat from the tent and cleaned air through the carbon filter
and the airconditioner cools it before it is taken back in to the tent. I like dedicated ducting.

3. I'd have the two 600's equally spaced over their respective 4'x5' area's and have the 90 watts evenly distributed either between them or around the edges.
I am trying to picture how it will fit together with the different lights, and if you remember from my grow tent I had the two 600's with the T5's on the outsides.

4. Congratulations on stepping up to the larger space, it's a lot of fun. Definitely think about the intake for offsetting your negative pressure. Negative is good, because
it guarantees you will not have air escaping except through the filter, which means no smell. But too much negative pressure stresses the fan and could stress the seams
of your tent over time, weakening the integrity.

For spacing lights, I like to give my plants roughly the same light energy that the sun is estimated to put out. Roughly 10,000 Lumens / square foot. A 600 watt light puts out 90,000 Lumens / foot at a one foot distance. Using the inverse square law, at two feet (twice the distance) it becomes 22,500 (1/4 the strength). At three feet from the bulb the light decreases to roughly 11,250 Lumens. Here is a really report on what happens to the photosystems of the plant when there is too much light. It basically explains that yes, plants in nature experience too much light basically everyday of their life. The sun puts out nearly twice as much light as plants require for photosynthesis. So what do plants do with it? They dissipate it as heat. They are very good at doing this but it does require energy to manage this function which would otherwise be used for other plant processes.

This here I find to be a key statement

"At low irradiance levels (low light levels) when photosynthetic membranes are in the high-efficiency state (Fig.1), leaves demonstrate an efficiency (i.e. quantum yield) for CO[SUB]2[/SUB] reduction that is close to the theoretical maximum (13). This exceptionally high efficiency is possible only because the amount of light absorbed by the antenna serving the two photosystems is closely balanced. Thus it is inescapable that at high irradiance levels when PSII photoprotective thermal dissipation is engaged, PSI will be absorbing many more photons than it is receiving electrons from PSII."


They are saying that at low, equal light distribution levels plants absorb the most light and use the maximum CO2 theoretically allowed. In high, unevenly distributed light systems one photosystem will be absorbing higher levels then the other, lowering overall efficiency.

When I see people sitting with their 600 watt hoods at like 6 inches to a foot above their canopies, and I even see people with 1000 watt hoods doing this, I cringe. People are blasting their plants with 50,000 lumens or more if they were to actually do the math. But there are still many people arguing that more light is always better with no adverse affects as long as you have the temperature under control. I don't care if you have a 72 and 50% humidity at 1 inch from the bulb, it should never be that close. (unless it's fluorescent.)

Matter of fact if you want to see someone rage at me over my light distances just a couple of days ago, check out this thread. The dude gave no scientific evidence to back up his claims, basically directed me to forum grows that backed up his theory that the light always needs to be closer. The truth is, there is more than one path to get to Rome and your grow will definitely take some tweaking and time. No two are the same.
 
Snafu1236

Snafu1236

Well-Known Member
Awesome post, Shrubs. Thank you to both sg15 and Shrubs for confirming my future setup.

I just read the whole thread over at reddit...that guy is a moron.

Photoinhibition is real, and more growers should strive to understand it better.

Much thanks for some solid information here.
 
B

backwood grower

Member
Awesome grow man, On your very last statement I have to add this, take a look at some LED grows (not you so much as the neigh sayers) and you will see what super high intensity does to these plants, it will bleach the leaves out when you put the light to close, with HID they seem to burn first but with cool led it bleachs them, people think it looks "cool" but really from my limited knowledge and reading it seems plants do this as a protection, they kill off the over saturated leaves and pull the chlorophyll out of the leaves (no chlorophyll= no Photosynthesis= not production value) and then try to focus energy elsewhere, worst part is this happens 99% of the time on the TOP buds which should be your best buds, so yes i am a firm believer that lights need to be a certain distance to maximize plant efficiency, and to close seems to be far worse for them than too far (just my observation) In my grow I had 2 plants shoot up damn near a foot taller than everything else and had to do some quick moving to prevent over saturation from my light, since the move to a more indirect lighting spot they are already doing better which further proves the point.

sorry that got a little out of hand but yea your grow is awesome cant wait to see the final results, keep up the good work.
 
Shrubs First

Shrubs First

Well-Known Member
Thanks guys. I've seen just what you're talking about with an LED grow. Tried explaining this and they
were convinced it was a unique plant deformation. Loved it.
 
Shrubs First

Shrubs First

Well-Known Member
Chopped today. Here are the pics. Got all twenty on to some clothes hangers and they're hanging just below the lights.

Room is sealed up and dark with fans on. Temperature set at 70 degrees with my dehumidifier set at 40%.

Just 8-10 days of drying now!









 
Someguy15

Someguy15

Well-Known Member
Shrubs First said:
Thanks, trimming should begin about a week from today. I'll post some pics then.

Haven't decided on the next round of clones, but it's sure to be a raw beast. :D
Click to expand...
U got some work ahead of you. Great lookin harvest. Wish I had the space to whole dry the crop but perpetual is always pushing me forward lol
 
Snafu1236

Snafu1236

Well-Known Member
Hey Shrubs, OGRascals gear is also over at SowAmazingSeeds.com...very highly priced, but still available there.

I just bought a pack of White Fire OG BX...which I believe is the exact same as you are running here.

Damn feminized seeds(which I don't believe in, but no choice here) set me back a hefty 175. Yikes.

Interested to hear your thoughts on these genetics thus far.

I am happy to have finally acquired some of these elusive genetics:)
 
Shrubs First

Shrubs First

Well-Known Member
Snafu1236 said:
Hey Shrubs, OGRascals gear is also over at SowAmazingSeeds.com...very highly priced, but still available there.

I just bought a pack of White Fire OG BX...which I believe is the exact same as you are running here.

Damn feminized seeds(which I don't believe in, but no choice here) set me back a hefty 175. Yikes.

Interested to hear your thoughts on these genetics thus far.

I am happy to have finally acquired some of these elusive genetics:)
Click to expand...
That White Fire OG in their pics looks just like mine, in my opinion. Great pick up!

The right pheno will be your star plant. It really shines, and has a killer high to boot!
 
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