Lighting and Ventilation
1,620 topics in this forum
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- 420 Crew
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I have 10 plants all at around 8 weeks and have been under 600w hps 24/0 and i switched to 18/6 one week ago. Ive noticed one plant has more budding sites and smells alot stronger and was wondering if i could start the flowering process now on that one while the others remain on 18/6. I would just sperate the one plant for 12 hours in complete darkness then let in rejoin the others?\ Any help would be appreciated, first grow....
Last reply by Skunkxxx, -
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- 420 Crew
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Which do you think is better and why? I've been looking into it and basically all I can find is never ending debates which end up delving into some some partially scientific/ pseudo-scientific arguments with heavy doses of anthropomorphism (I.e. "Well put it this way. I need sleep, therefore, so do my plants!"). However when it comes to input from those clearly versed in plant biology etc. it seems that many lean towards the notion that marijuana doesn't actually seem to benefit from any more than a maximum of 18 hours of light per 24 hour period, despite what even veteran grower Ed Rosenthal may state. Then again there really seems to be a lot of allegations of misun…
Last reply by space cadet 101, -
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Just a quicky here. Can you tell me if or how to use cool tubes on a light rail?
Last reply by DUFFBAG, -
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Hey all, found some interesting info for anyone setting up multiple ducts in their room. Chef Read On: Flow of Air Now, the challenge is to get the proper amount of air into each room at the same time. This is where things begin to get complicated. Here is the problem. The furnace blower fan only creates a certain amount of energy at any given instant. This energy is constant. If one room gets too much air (energy), there won't be enough for the remaining rooms. Remember, different amounts of air (energy) are going to each room. To achieve the goal of getting the proper amount of air (energy) into each room at the same time is to have equalized static pre…
Last reply by HashMakerOilProducts, -
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hey all, I have a 6x6x6 room with two 600w cooltubes, and am wondering if one 150mm centrifugal fan will be adequate to vent the room through a cf AND the cooltubes. My room has a passive intake. i am a bit stumped on setting it up. Should I go : CF, fan, split to cooltubes, exhaust? Or: Passive intakes for cooltubes, 3 way splitter(one for the Cf), fan, exhaust? I have heard it is better for the fan to blow air through cooltubes, rather than suck hot air through the fan. Any suggestions will be greatly appreciated! Chef
Last reply by Gazza2001au, -
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Hi people, Got issue with room hovering around 30-32 degrees under lights. I have two pedestal fans, a 200mm inline air intake from outdoors, a small portable aircon (which does F'kall) and carbon filter drawing air out. To me it seems the carbon filter isnt drawing out the air quick enough. Would it be worth getting a 300mm inline fan just to draw that extra hot air out of the room Summer hasn't even kicked in yet. Also my room is set up properly and insulated. Your thoughts please................
Last reply by Gazza2001au, -
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- 420 Crew
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hey folks Im not knocking this new 12-1 lighting regime here ..ok just posting a couple of observations ive made over the years ive been growing .. so make what you will of the following often i grow outdoors in summer so i start the plants off indoors under hps 13 hours light(gradually increasing over time), 11 hrs dark, so that when i put the plants out they are roughly on the same timeline as the Sun and dont go straight to flower when i grow indoors exclusively i run 18 to 20 hours light, 6-4 hours dark (average) now for me it is as plain as the nose on ya face that the 18/6 light plants outstrip the growth of the 13 hr light plants by a phenomenal amount. …
Last reply by The Claw, -
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hey guys im almost finished seting up my grow room all i need is 3 fans cooltube and ph/ec testers going to get that tommorow. i need a 250mm fan for the CF a 200mm for intake and a 200mm for cooltube i really want them to be whisper quiet which brand should i go for also did a room calculation and it says for optimum i need to move 93.2 Cubic Feet per Minute but i want to go for the max which is 110.2 Cubic Feet per Minute i looked at alot of online hydro shops but none of them tell u that info. also wanted to know how many watts are the fans as i dont want to exceed 1000w for my grow op couse then im better off bying from dealers.
Last reply by Nymphetamine, -
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- 420 Crew
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Hi Ozstonians! I am tempted to purchase a lumatek from the states. This is why 600w AU $362 USA $232 Inc Shipping 1000W AU $450 USA $355 Inc Shipping the states have them in both 120/240 variable and as a dedicated 240v version. I was wondering if the mains plugs on these things are hard wired? or of they are similar in the way a PC power cable works and you can disconnect the power lead and reattach a new one? If any one could check their Aussie version to see if the cable disconnect would be appreciated. Better yet if anyone has purchased one from the states i would love to hear about it. Thanks
Last reply by jaikai, -
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Hi all, I'm having a lot of trouble figuring out the best choice of fan for my new tent. Ive been reading so much my brain is starting to overload and I still cant make up my mind so was hoping one of you nice people could double check my calculations please (mostly worked out with the Cannaversity calc.) Tent - 1.5mtr x 1.5mtr x 2.0mtr (5ft x 5ft x 6.75ft) = apx 25.0 sq feet light 600w CFM - 139 Light 1000w CFM - 153.5 (Will be running a 600w HPS for the hotter weather but do want to upgrade to a 1000w HPS later on.) So going on the 1000w specs the room requires 155CFM, x2 that for pressure resistance via carbon filter = 310CFM, x 1/3 for temps = 360CFM x…
Last reply by chook93, -
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- 420 Crew
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Hi Peeps, I brought a 600W quantum ballast that came from the states. Had to buy a new main power cord with standard australian power points and today just brought a 150mm cooltube but that cord won't plug into the ballast either.. I knew I'd have to get the new power cord but wasn't expecting a cooltube not to plug into it....Just want to see if anyone can help me out as i dont really want to fork out for another cooltube or ballast. Just seeing if there is something I can do....
Last reply by Ganja Gorilla, -
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This is my first indoor grow, I have a 4 pot dwc in a 36m2 room. I have yet to purchase lights, but am thinking of running 2 600W HPS+MH digi ballast cooltubes for about $380 ea. Has anyone used these, and what did you think? Id really like some good opinions and advice before making my biggest purchase. Thanx, Chef
Last reply by Auntynorm, -
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- 420 Crew
- 4 replies
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Hi, i've got a 400w hps bulb that i'm testing in my grow cupboard (500x750x1500mm) and at first observations itt would seem to create too much heat for this area.. my question is would it be possible to run this lighting wattage with a good ventilation system, and what would i need in terms of size, 150, 250mm fan? i'm looking away from cooltubes except for a las resort. any advice would be greatly appreciated, cheers, dizzy
Last reply by dizzy, -
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Nothing major but saw this in the catalogue and know my set up could benefit from the extra air flow What do u guys think? Good deal? I didn't even notice the tower till i was taking a photo of the other fan, as it looks like it can be manouvered easily in any direction with 3 speeds could come in handy, then saw the 75 degree oscillating tower, am imaging two opposing each other being a great air mover but is it worth the 90w, im not sure.
Last reply by The Claw, -
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I recently bought a new carbon filter, after some comments from neighbours... I ordered a mountain air brand, but the one they sent was indoor elements Are these 2 seperate brands or does indoor elements make mountain air filters?? basically I feel they have sent me a cheaper, crappier brand thanks
Last reply by Pleb Scrubber,
