Professor Marijuana's 45 Day Grow Q & A

303 said:

Vents are 8".. I pull air from outside the house in a window box, and it exists out another window box. I live in the high country, temps are never over 75 outside. I use a 8" Can fan, this fan is only for the lights, its only on when lights are on... I do understand the lights need to be resealed. I use aluminum duct tape to seal it, this prevents co2 leakage. I have a 8" intake pulling from outside in, everything is on a CAP atmosphere controller (intake and exhaust). Also a 8" exhaust fan attached to a can carbon filter. Also running co2, also works off CAP controller connected to the cap ppm-1 meter. I have the co2 line attached to a CAP osocialting fan that pushes a lot of air. I run recirculating hydro setup. I do not have chillers, I really don't need them. Thing is I think you think the temp of the light is burning the buds, it is not. The glass on the lights are as cool as the concrete floor, I think the light is too intense therefore burning them, like a sunburn. And it sucks because its all the really nice tops end up looking fucked up. So this run I'm 12" away. Any closer and they get bleached, from exp... Any suggestions? Thanks.
Basically this is the configuration..

Click to expand...

Awesome set up! That is one of the nicest diagrams I have ever seen on here.

303 said:

Vents are 8".. I pull air from outside the house in a window box, and it exists out another window box. I live in the high country, temps are never over 75 outside. I use a 8" Can fan, this fan is only for the lights, its only on when lights are on... I do understand the lights need to be resealed. I use aluminum duct tape to seal it, this prevents co2 leakage. I have a 8" intake pulling from outside in, everything is on a CAP atmosphere controller (intake and exhaust). Also a 8" exhaust fan attached to a can carbon filter. Also running co2, also works off CAP controller connected to the cap ppm-1 meter. I have the co2 line attached to a CAP osocialting fan that pushes a lot of air. I run recirculating hydro setup. I do not have chillers, I really don't need them. Thing is I think you think the temp of the light is burning the buds, it is not. The glass on the lights are as cool as the concrete floor, I think the light is too intense therefore burning them, like a sunburn. And it sucks because its all the really nice tops end up looking fucked up. So this run I'm 12" away. Any closer and they get bleached, from exp... Any suggestions? Thanks.
Basically this is the configuration..

Click to expand...

OK 303, outstanding diagram, others take note of this growers layout it's first class, hats off to you my friend. White Floor? Look at the MAX fan, outstanding product. I attach my fan directly onto the first hood. DON'T FORGET YOUR BOOSTER FAN, place it a couple feet before the end. Good diagram of an aerflo2/60 except pump placement, 2 of the XXXL's will give you an almost exact footprint as the 60. Do you really need to exhaust the room? I'd make sure your not dumping C02 if it's not needed, push your temps to 90 or even 95 with the C02 if you need to, will help cut down the chance of bringing in mites. Your next purchase needs to be a water cooler, get the big one so it doesn't over work itself. keep water at 65 and that will help your plants a ton. What Bulbs? how old? Folks remember C02 is heavier then oxygen and must be pushed off the floor. Very important to have floor sweeps and joints taped and sealed or it will pour out just like water. 1400ppm for C02. I don't care for the continous read ph/ppm meter, you have the blue one? I really like the Hanna ph/ppm/ec meter. You draw the diagram? Really nice. outstanding layout. Are you using H&G nutes and are you draining regularly? In CO? Would love to meet you and take a peek, you're right there and could be a real player just fine tuning. If I can help you I would be honored.

not understanding why in the diogram there is a fresh air intake. that room is no where near sealed. theres a co2 bottle in there.
wtf going on here!! are we being bamboozled or what?

a mongo frog said:

not understanding why in the diogram there is a fresh air intake. that room is no where near sealed. theres a co2 bottle in there.
wtf going on here!! are we being bamboozled or what?

Click to expand...

ha,i was jus about to ask what was that intake for?

a mongo frog said:

not understanding why in the diogram there is a fresh air intake. that room is no where near sealed. theres a co2 bottle in there.
wtf going on here!! are we being bamboozled or what?

Click to expand...

Most rooms can't be completely sealed. I am able to do so mostly because we are in commercial building that have 20 foot ceilings. Few home grows are able to do that. Nothing wrong with it if you need to exhaust heat. It's a top notch home room. I was impressed he has it, first class home grow

genuity said:

ha,i was jus about to ask what was that intake for?

Click to expand...

If you're going to exhaust you need to bring air in or you would have a vacumn. Also should note that if you're not adding C02 you MUST bring fresh air in or you will stunt your girls. C02 has to be replaced. I'm not sure I have ever seen a serious home grow that doesn't bring in air. What is the issue with that? I'm not sure what the concern with that is, I'd like to know if you don't mind. Not confrontational at all friend just curious why it seems incorrect. We all get to learn here, me included. Thanks for both of your input I appreciate it.

Professor Marijuana said:

If you're going to exhaust you need to bring air in or you would have a vacumn. Also should note that if you're not adding C02 you MUST bring fresh air in or you will stunt your girls. C02 has to be replaced. I'm not sure I have ever seen a serious home grow that doesn't bring in air. What is the issue with that? I'm not sure what the concern with that is, I'd like to know if you don't mind. Not confrontational at all friend just curious why it seems incorrect. We all get to learn here, me included. Thanks for both of your input I appreciate it.

Click to expand...

well if i was wrong with what i stated as far as fresh air intake i stand corected. i for one have been trying to log alot of time trying to seal my grow area for bringing in extra co2. i was under the understanding
that the less in and out venting going on is what im trying to strive for.

a mongo frog said:

not understanding why in the diogram there is a fresh air intake. that room is no where near sealed. theres a co2 bottle in there.
wtf going on here!! are we being bamboozled or what?

Click to expand...

Intake is on a damper. When temp gets to 83 co2 shuts off, intake comes on with fresh cool air, exhaust up high rid the spent co2, temp drops ppm drops pretty much within minute or two esp during winter. CO2 comes back on when the correct temp is desired, both intake and exhaust come off and so on. Atmosphere controllers make life easy. Its pretty damn close to being sealed. I'll take some pics, if anyone wants to see it..? I understand high temps can be beneficial but until I get a better dehumidifier 83 will have to do.. For anything higher my dehum doesn't work to my desired RH%. I don't even think my room could get that hot, unless I unplugged the 8" fan that cools my lights. Anyway back to the lights being close to the canopy, what are your thoughts on all information given? Thanks again!!

303 said:

Intake is on a damper. When temp gets to 83 co2 shuts off, intake comes on with fresh cool air, exhaust up high rid the spent co2, temp drops ppm drops pretty much within minute or two esp during winter. CO2 comes back on when the correct temp is desired, both intake and exhaust come off and so on. Atmosphere controllers make life easy. Its pretty damn close to being sealed. I'll take some pics, if anyone wants to see it..?

Click to expand...

i luv the room looks great. an a/c might go a long way for u.

a mongo frog said:

i luv the room looks great. an a/c might go a long way for u.

Click to expand...

Thanks. That's what the intake is for. Where I live I have natural AC outside, beauty of living 10,000ft...

So guys air from outside is that neccesary, is that a must? I live in the desert and its about 110dg out side I have no co2 there is no way im letting that heat in I usally open the room door for freash air with cieling fan circulating soon I have to purchase an inline fan 750cfm when I put up my 1k watt with my 600watt I was going to use that for venting and cooling the lights but prof mj said it will be like a vacuum in the room so Im stuck on what to do. Help me on this guys.

i have seen a great grow where the person had an window a/c as his only source of intake. no exaust. just lights vented.
dude had good yields and great meds.

As in most threads here.............

Willyßagseed;6178398 said:

As in most threads here.............

Click to expand...

Got that trichhomo, pappl and other trolls im ignoring them i got knowledge to gain.

a mongo frog said:

well if i was wrong with what i stated as far as fresh air intake i stand corected. i for one have been trying to log alot of time trying to seal my grow area for bringing in extra co2. i was under the understanding
that the less in and out venting going on is what im trying to strive for.

Click to expand...

It is. But only if you're supplying enough C02. Less intake means less insects.

Professor Marijuana said:

It is. But only if you're supplying enough C02. Less intake means less insects.

Click to expand...

not sure what supplying enough co2 means. im confused now.

"I don't use addatives at any stage. I believe in genetics, environment, knowlege and attention to detail. Most growers will get more gain by paying attention then from addatives. Paying attention is free.

Cool?" - Professor Marijuana

This is all I need to read to figure out what he's about. Bless you sir and continue imparting knowledge. The forums need more non-bs experts like you.

Cheers.

K

don2009 said:

So guys air from outside is that neccesary, is that a must? I live in the desert and its about 110dg out side I have no co2 there is no way im letting that heat in I usally open the room door for freash air with cieling fan circulating soon I have to purchase an inline fan 750cfm when I put up my 1k watt with my 600watt I was going to use that for venting and cooling the lights but prof mj said it will be like a vacuum in the room so Im stuck on what to do. Help me on this guys.

Click to expand...

The plants will use up the C02 just as we use oxygen, no difference. If you don't replace expended C02 you end up with a room full of oxygen. Great for us suuficates the girls

a mongo frog said:

not sure what supplying enough co2 means. im confused now.

Click to expand...

There is about 300 to 350 ppm of C02 in the atmosphere naturally. Cannabis can use up to 1400ppm's. You MUST replace the C02 or you're dwarfing your girls. An AC is still bringing in C02 just cooling it first. It is still pushing new air in. Think of C02 for the plants just as Oxygen for you, if you sat in a sealed room the oxygen would be used up and you'd have a room full of C02, just the opposite for your girls

koulajitong said:

"I don't use addatives at any stage. I believe in genetics, environment, knowlege and attention to detail. Most growers will get more gain by paying attention then from addatives. Paying attention is free.

Cool?" - Professor Marijuana

This is all I need to read to figure out what he's about. Bless you sir and continue imparting knowledge. The forums need more non-bs experts like you.

Cheers.

K

Click to expand...

Thank you, I'm trying. Get's a bit frustrating but I figure we're doing some good inspite of finger pointing. Still haven't seen a single useful word from anyone trashing me. Proof is in the pudding.