400w Club-Show Off Your 400w Pride And Joy

cool thanks for the tips man. Ive tried everything to lower the temp. its turned into quiet the bitch. but it seems to stay constant around 81.5 and never goes over 82 so i think i should be ok if what you say is right. thanks again man

Make sure you are checkng the temps at canopy level. The temps can vary by more than 10degrees from the bottom to the top of the cab.

Also, stick your hand at canopy level and make sure its not hot on your palm. As long as your plants are not recieving tons of radiant heat from the bulb, they can handle higher air temps.

yea i got the basics thanks man

Hey guys, I figured if anyone could help me, someone on this thread could.

I'm planning on building a new grow cab, and I was planning on having one exhaust fan for general exhaust, and another one to use on the cool tube of my 400 watt hps. What cfm rating would you suggest would provide sufficient ventilation for a 400 watt hps, with no carbon scrubber attached? I know size and amount of ducting matters, but I am just looking for a general idea.

I personally am very fond of the S&P Mixvent fans. You can find them, as well as all the information about them here:
Soler & Palau Commercial Centrifugal, Axial, Propeller, Exhaust and Supply Fans - Soler and Palau - HVACQuick.com

Thanks guys.

TheGeneral1 said:

Question for you guys:
18sq ft closet, with an ac vent in the closet and a fan, currently have a 150w HPS and have no heat problems, will it work if I move up to 400w HPS? Using a waterfarm for one plant two weeks into flowering but have two 18" plants I need to put in there so need more light.....

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Anybody? It's my first plant and got real lucky to have a girl first time out....owe it all to this message board

^^^^^ i would if i were you but then agine i did ......

specialkayme said:

Hey guys, I figured if anyone could help me, someone on this thread could.

I'm planning on building a new grow cab, and I was planning on having one exhaust fan for general exhaust, and another one to use on the cool tube of my 400 watt hps. What cfm rating would you suggest would provide sufficient ventilation for a 400 watt hps, with no carbon scrubber attached? I know size and amount of ducting matters, but I am just looking for a general idea.

I personally am very fond of the S&P Mixvent fans. You can find them, as well as all the information about them here:
Soler & Palau Commercial Centrifugal, Axial, Propeller, Exhaust and Supply Fans - Soler and Palau - HVACQuick.com

Thanks guys.

Click to expand...

I use a small 50 cfm fan to pull air through my cooltube and out of the room for a 1000w HPS and my room never gets over 90 F.

So freakin' close to harvest of these little bitches. I'm actually doin some personal tests and have cut 2 of em already each a week apart. They're drying now and I'll cure them once that's over. More or less to see whats the difference between later cuts and early harvests, Flushing vs. not flushing. Different cure methods will also be used. I didn't veg these plants I just put them under flowering light right from cuttings. If I could do it again I would definately veg for awhile to grow the plants up bigger. Next time I guess tho right?!

those look nice sleeper, good job. I was wondering, how long do you dry before you put into somthing to cure it. I have heard so many different methods. from drying for 24 then curing for 8 then drying for 24 then curing for 10 then drying for 24 and so on and so on. just curious what u perfer. thanks dude

check my grow journal here. It's a little out of date, but I'm gonna have some new pics up tomorrow. It's some sweet tasting and sweet smelling organic bud. I can't wait till it's done.

HydroChron said:

those look nice sleeper, good job. I was wondering, how long do you dry before you put into somthing to cure it. I have heard so many different methods. from drying for 24 then curing for 8 then drying for 24 then curing for 10 then drying for 24 and so on and so on. just curious what u perfer. thanks dude

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I've never heard of you're method there. For the most part I've always "read" that you should dry in a dark place with sufficient air flow. I use a larger cardboard box with string lines across the top to hang the buds with slits cut in the ends to let air pass through and the top flaps close off the top. You will know they are dried when the stem will make a "snap" when you go to break it. I then cure in glass air tight jars which should be opened at least once daily and you should move the bud around and not have it completely packed because there is still a chance of mold. They call it "burping" the jars. The jars should also be kept in a dark place because it's said that light degrades THC.

Also if you feel that you have over dried the bud you can add bread or peels from an orange or apple to add moisture back. Be careful not to create a mold problem for yourself though.

here are some updated pics of my 400w bag seed grow....

GC clone
Waterfarm
GH three part flora and kool bloom
12/12 400w HPS
flowering for 14 days

Heres mine i transplanted from an aerogarden 14 days ago

[/IMG]
32 days

35 days lower cola [/IMG]

This is my second harvest. It came out to 6.25 Ounces. All off a 400 HPS. Wanted it to be 8 ounces, but hey, I'll take what I can get.

DeweyKox said:

This is my second harvest. It came out to 6.25 Ounces. All off a 400 HPS. Wanted it to be 8 ounces, but hey, I'll take what I can get.

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nice harvest man! how many plants did u have to get that 6 oz.

7, but one was weak, otherwise I would have had about 8 ounces. Thanks dude.

upinchronic1 said:

dont be shy... I have seen these clubs on other formus and there fucking aesome for people who are just getting into growing, with the 400w hps, to get an idea of what a good space is, ventilation needed, methods, plus stealth ideas, it would be like brainstorm of cabs in a way...

Someone get this thread started... You all know its going to be fucking tight shit..

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I don't have any bud shots YET to show off but I am finally glad to say I am the proud owner of a 400w hps. My cab isn't all the way done- as I am waiting on my Inline Fan Controller and Inline Fan to come.. also ran out of mylar which is why the doors arn't covered yet. I hooked a small crap inline duct fan up temp until the stuff comes (mid week).. too anxious to put my lady under it and this is what she looks like...
- the space is total 5 sq ft.. 38" usable grow height (53 1/2" total grow chamber [76" total O.A. Cab Height]) x 38" wide x 19 1/2" deep.
-Purchased the cab at Meijers on sale for $80... Suppose to be like wardrobe thing... just used one shelf to seperate grow chamber from clean exhaust.
-Going to add a few more holes in bottom for intake when other fan arrives but air is pulled from bottom, up through DIY cool tube, into top chamber-out carbon filter and I drilled more 2 1/2" holes on top of the cab to exhaust air.. that way the back looks clean in case someone gets nosey (locked from front)



Cant wait till she starts budding... about week in half into 12/12

Well, I've been eye-ballin this thread for a long time and am close to harvest. I have a 400w Sunmaster MH-HPS conversion bulb. Closet grow- first hydro......

GHS Trainwreck on left, Barney's Crimea Blue on right. 52 Days Flowering


Crimea Blue




Trainwreck