Grow tent 600w hps hydro under construction

Looking good brother!

anon1122 said:

I think I'll give that setup a go. I'm thinking about big buddha's blue cheese. What company is your widow from laserbrn?

I sincerely appreciate you guys taking time to give me input. Hopefully with the knowledge I have and what you guys can supply as well this will go smoothly.

Is it safe to assume I should run the ff nutes at 1/2 strength when I get started?

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The Blue Cheese is definitely a good smoke, but I didn't like growing it with White Widow. It didn't have nearly the same nutrient needs. I grew Dutch Passions White Widow and I just loaded it up with the same again.
kiss-ass

just set up my filter and fan. I have the fan and filter on the outside. the fan is blowing into the filter, and sucking through duct work that attaches to one end of the air cooled hood. It seems like it isn't drawing enough air though. I am worried it won't be enough for smell. Any input?

scratch that. put the fan/filter back on inside. creates a negative pressure zone and I think it will be more efficient. wayyy more air being moved. I am going to do a dry run for a couple days to work out any heat issues or anything else that may arise. I'll keep everyone updated.

I haven't seen your exact setup, but it moves WAY more air with the filter inside and the fan blowing out? How did you determine that it's moving WAY more air?

I've run mine both ways and never had a noticeable difference in temperature. Mine does sit RIGHT outside and in the configuration you stated and it keeps the inside of my tent about 4-5 degrees warmer than the outside of the tent with a 600w. So it stays about 78-80 degrees (directly under center of the lamp @ canopy height) without any problems.

I'm just suprised you see THAT much of a difference, but I don't know how you are gauging it either.

I'm about to start the EXACT same setup. I think you're right on track so far, because it's exactly how I would have done it. Now I'm thinking ahead a bit and trying to figure out an ebb & flow setup that easy to clean and maintain. I'll keep in touch

Trying to get a screen built, but working with limited space. A screen might not be in the cards because I will have to lift the tray the plants will be sitting in to refill the res. It may just complicate things more than help. What do you guys think?

laserbrn said:

I haven't seen your exact setup, but it moves WAY more air with the filter inside and the fan blowing out? How did you determine that it's moving WAY more air?

I've run mine both ways and never had a noticeable difference in temperature. Mine does sit RIGHT outside and in the configuration you stated and it keeps the inside of my tent about 4-5 degrees warmer than the outside of the tent with a 600w. So it stays about 78-80 degrees (directly under center of the lamp @ canopy height) without any problems.

I'm just suprised you see THAT much of a difference, but I don't know how you are gauging it either.

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When I had the filter and fan on the outside and it was running, it felt like very little air was being drawn through the ducting. I held my hand to the other end of the hood and it felt like nothing. So it made me worry about smell.

Then I put the filter and fan inside the tent, the fan sucks air through the filter and exhausts directly out of the tent. With this set up, it creates a negative pressure area in the tent and it looks like it's being sucked in, which I feel will work not only for smell, but heat as well.

The tent is 104 cubic feet and the fan moves 435 cubic feet per minute. So if the fan is exchanging the air at over 4x per minute heat shouldn't stand a chance.

I think this will be the best way to run it in my set up. As soon as I can get a working camera around here I'll take more pics.

As for a strain, here is what I am leaning towards...

Barney's Farm Crimea Blue

i recommend, if possible, having the air pulled through the filter. then your air cooled hood. then fan. then out the exhaust. in that order. if possible. does your hood have a lens over the light or is it completely open?

heat rises, remember that. so having the air sucked through the highest possible point is best. also you can get away with not using that carbon scrubber until you start flowering. it shouldnt smell until past the 2nd week of flowering.

It certainly works best to have the filter inside the tent if possible, I just found it very difficult to do in a 4x4 tent. I also wanted to make sure that I was pulling air through the light and not pushing it. I've tested it both ways and the temp difference was about 2 degrees by pulling instead of pushing. Consistently.

laserbrn said:

It certainly works best to have the filter inside the tent if possible, I just found it very difficult to do in a 4x4 tent. I also wanted to make sure that I was pulling air through the light and not pushing it. I've tested it both ways and the temp difference was about 2 degrees by pulling instead of pushing. Consistently.

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Lol, you ain't lying, brother........pics are in my grow journal, but it's a real bitch fitting three inlines, a filter, and a reflector in a 4x4 tent.

Not fun at all, lemme tell you.

BTW Anon, we're both learning as we go with setting these things up, but take a look at my setup (like I've been doing with yours) for some ideas if you get stuck.

Good luck, bro.

Bob Smith said:

Lol, you ain't lying, brother........pics are in my grow journal, but it's a real bitch fitting three inlines, a filter, and a reflector in a 4x4 tent.

Not fun at all, lemme tell you.

BTW Anon, we're both learning as we go with setting these things up, but take a look at my setup (like I've been doing with yours) for some ideas if you get stuck.

Good luck, bro.

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That's why my fan and filter are outide. I have a SCROG screen in there too, so it would only stand to make matters worse. And with a 3x3 tray inside my 4x4 tent, there wasn't any room to prop it up from ground, had to suspend it from the ceiling and Can-66 Filters are NOT light. It would hinger my lights, it's just never going to work. It needed to be outside.

I can't believe that with a 400+CFM fan you had temp problems running it this way anon....seems nuts.

I'm using a 365cfm fan and I'm strongly considering picking up a 1000w ballast and lamp to run in it. Granted I run my dark periods overnight and during the winter night time temps drop so low that I certainly won't need A/C to keep it cool. Right now the night time temps are in the 40's and that's plenty cool to keep things runnin' smoothly.

I haven't gotten it up and running yet, but I'm going to be running a 1000HPS with a 6" inline (435CFM) cooling that, then a 6" inline hooked up to a filter for exhaust, and a 4" inline for intake.

Similar setup in my 2x4 veg tent except that the 6" inline is responsible for cooling the reflector and for exhaust (no filter), and those temps stay about 1 to 1.5 degrees warmer than outside of the tent.

Hoping to have the same success, although I can live with 3 or 4 degrees higher than room temp in my flowering tent.

Just for reference, here's what the setup looks like as of yesterday (obviously not done, but that's the way I'm thinking the main parts are going to be setup):



Here's the light being cooled by its 6" with the filter being run by its 6" behind it.



Close up of the filter.

Maybe these pics will give you some ideas, maybe they won't, but either way, good luck to you.

Now I've gotta go find some space for a 4" inline somewhere in that damn tent.

I just got a +rep from someone asking if my PC was fucked now. What happened? My PC is fine.

Why would a thread on a forum fuck up a PC?

laserbrn, Im sure it would work on the outside, but it just seemed like smell would be an issue. I'm going to work on it today and see what I can come up with. Thank you everyone for helping me. It makes this worlds easier.

anon1122 said:

laserbrn, Im sure it would work on the outside, but it just seemed like smell would be an issue. I'm going to work on it today and see what I can come up with. Thank you everyone for helping me. It makes this worlds easier.

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The same amount of air still passes through the carbon filter. Why would smell suddenly become an issue? I'm not understanding.

I have the best filtration I have every come across and it starts with my Can 66 filter outside my tent. The tent sits in a seperate bedroom and there is an Ozone Generator in the room. It's on a timer so that it comes on for 15 minutes every hour and a half. 9 weeks into flowering my last batch I couldn't smell it until I opened the tent and my face was literally IN the tent. I have family, friends, friends of family and all kinds of people in my place and nobody ever suspects a thing. Hardly anyone knows I even SMOKE pot in the place, all day long.

laserbrn said:

I just got a +rep from someone asking if my PC was fucked now. What happened? My PC is fine.

Why would a thread on a forum fuck up a PC?

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It's from that troll who tried to post 900 threads that he's infecting the whole site with viruses.

Just ignore it, should be neutral rep (blue), no?

Bob Smith said:

It's from that troll who tried to post 900 threads that he's infecting the whole site with viruses.

Just ignore it, should be neutral rep (blue), no?

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You're right, it is. What a doorknob.

Well, my reasoning was that if the fan is sitting on top of the filter on the outside of the tent, and the ducting goes up and onto the top of the tent and then down into the duct hole and then attaches to the hood, i put my hand on the other side of the hood that was open and you could feel it pulling some air, but it did not make the tent concave.

When the filter and fan is inside the tent, all sides of the tent are sucked in and there is forceful air coming out of the exhaust ducting. So it would seem to be more efficient this way, but I am a newbie so I could very well be wrong.

I read somewhere that every bend in the ducting makes you lose air pressure. I think that because the fan is trying to suck with pressure through bends and at least 10 feet of ducting that it is losing significant pressure. Therefore not moving as much air out of my tent.

Im thinking now about keeping the fan and filter in the tent and just running it through the hood on the way out. seal up the flanges of the light where the glass is with duct tape and vent it that way. I know that you said it is a 2 degree difference whether pull or push but at least I'd be doing something about cooling the hood.

Thanks for taking time out to help.