C
cork144
whack a 120mm pc fan blowing onto your 150w hps, preferably with an inlet close by to the fan or even using the 120mm as an inlet, maybe finding a better fan which can take more static pressure through your filter,
RadaRada's Grow Cab: Durban poison, Hollands Hope
- Thread starter RadaRada
- Start date
irie4i
Member
Use a small portable A/C unit to cool the air inside the closet, or, leave the closet open(also putting a fan on the closet dosn't hurt).
Reguardless of your intake+vent, ambient temperature has to be low. There is always going to be a +4*/+5* diffrence in even the most well circulated area, the air you put in has to be cold to begin with.
Reguardless of your intake+vent, ambient temperature has to be low. There is always going to be a +4*/+5* diffrence in even the most well circulated area, the air you put in has to be cold to begin with.
BorkBorkBork
Member
Lots of good advice here.
Having gone through what I've gone through, I would have only one piece of advice for someone starting out fresh: Ventilation, ventilation, ventilation. I knew it was important, but treated it as an afterthought anyways, and paid the price.
The exhaust fan just doesn't seem sufficient, and you're better off having too much, rather than not enough ventilation. And as stated, you must cool the intake somehow, because your cab temp will always be higher than the ambient temp.
I'd save the additional beans until I got the cab a little more dialed in, but that's just me.
Good luck!
Having gone through what I've gone through, I would have only one piece of advice for someone starting out fresh: Ventilation, ventilation, ventilation. I knew it was important, but treated it as an afterthought anyways, and paid the price.
The exhaust fan just doesn't seem sufficient, and you're better off having too much, rather than not enough ventilation. And as stated, you must cool the intake somehow, because your cab temp will always be higher than the ambient temp.
I'd save the additional beans until I got the cab a little more dialed in, but that's just me.
Good luck!
RadaRada
Member
i have decided to make the vented hood out of a glass pane. i will use two pc fans about 35 CFM each to vent the hood.
because this is a hood it will greatly reduce the temp in the actual growing area like SCRUB said. because of this i can possibly even get rid of my noisy 80 CFM exaust fan and just use another PC fan to ventilate the actual grow area.
this will make my box much stealthier and possibly allow me to move it out of the closet
, although the HPS ballast is pretty noisy it should be muffled pretty well if i just toss it back in the vented hood.
because this is a hood it will greatly reduce the temp in the actual growing area like SCRUB said. because of this i can possibly even get rid of my noisy 80 CFM exaust fan and just use another PC fan to ventilate the actual grow area.
this will make my box much stealthier and possibly allow me to move it out of the closet
, although the HPS ballast is pretty noisy it should be muffled pretty well if i just toss it back in the vented hood.
That was actually red that mentioned the hood in this thread but I know what ya mean. I suspect you may want more than 35cfm fans, especially if you're running them inline. I'm only guessing, I don't use hps. Don't forget there will no doubt be *some* restriction with the hood, caused by ducting bends or light traps.
RadaRada
Member
glass instalation
glass instalation
i went to wal mart and picked up two $6 10"x20" picture frames got out my dremel and cut a bigass hole in the extra shelf that came with my cab.
i finished installing everything except i am going to get rid of my 80 CFM fan for now and replace it with another 35 CFM pc fan so that i can move the box out of my closet... for now i am just keeping the door open.
here are the results:
These are pictures i took while i was constructing the shelf:
remember there are two panes of glass
PS i used photobucket only because i had to upload 7 images and its uploader is much much faster than icmags. but when i am uploading 4 pics or less and esp when they are blatant pics of marijuana plants i will use icmag.
glass instalation
i went to wal mart and picked up two $6 10"x20" picture frames got out my dremel and cut a bigass hole in the extra shelf that came with my cab.
i finished installing everything except i am going to get rid of my 80 CFM fan for now and replace it with another 35 CFM pc fan so that i can move the box out of my closet... for now i am just keeping the door open.
here are the results:
These are pictures i took while i was constructing the shelf:
remember there are two panes of glass
PS i used photobucket only because i had to upload 7 images and its uploader is much much faster than icmags. but when i am uploading 4 pics or less and esp when they are blatant pics of marijuana plants i will use icmag.
RadaRada
Member
I tied another string on the durban poison today, and i also took out my 80 CFM fan and put in another 36 CFM fan to vent the light hood.
also i am germing 3 more seeds and i planted one today the other two should be ready tommorow. hopefully i get 2 or 3 ladies that will give me a few ounces before i go back to college at the end of august
also i am germing 3 more seeds and i planted one today the other two should be ready tommorow. hopefully i get 2 or 3 ladies that will give me a few ounces before i go back to college at the end of august
Hmmm I'm not sure I understand, rada. Your carbon filter is at the wrong place by the looks? You need the carbon filter at the exhaust for the lower section so the smell of the plants gets cleaned. You want a fast free flow of air thru the top section to cool the light/ballast etc and that air doesn't need filtering.
How come you're using two sheets of glass? It also looks like regular window glass. I'm pretty sure the glass pane designed for the hood is 2mm thick. I think a 150 would have a hard time with so much thickness?
I've probably missed something. I'm sure you've got it under control and good luck with the sprouts.
Edit: Also is that blue LEDs in the fan? You will want to snip the wire to them or else they'll be on in lights off.
How come you're using two sheets of glass? It also looks like regular window glass. I'm pretty sure the glass pane designed for the hood is 2mm thick. I think a 150 would have a hard time with so much thickness?
I've probably missed something. I'm sure you've got it under control and good luck with the sprouts.
Edit: Also is that blue LEDs in the fan? You will want to snip the wire to them or else they'll be on in lights off.
RadaRada
Member
thanks scrub i hadnt really thought of those LED's as being much of a big deal, but ill snip em tommorow
lol i know the carbon filter needs to be setup under the light, i have an intake fan and an exaust fan to cool that new light hood. i have two panes of glass because i thought it would keep extra heat out...
that was a very helpful link you sent me btw i appreciate it ill have to find out where my local dro store is.... or find out where i can order custom tempered glass sheets
irie4i
Member
Any light is a big deal, even a small LED can really wreck a flower expecially if it gets close enough(e.g. several grow logs with reports of buds near the LED(within inches) herming or otherwise remaining airy/undeveloped). Black electrical tape works just as well as cutting the diode.
Definatly visit the hydro store and get glass meant for garden use. Good call with the PC fans, using a glass pane looks like the way to go, just throw some PC fans in the chamber with the light and put this problem behind you.
Also, your carbon scrubber dosn't work up there when you seal the room with a glass pane. You probably realised this. I'm under the impression alot of the bulb heat comes from the ballast. You have alot of of planning and reading to do.
Definatly visit the hydro store and get glass meant for garden use. Good call with the PC fans, using a glass pane looks like the way to go, just throw some PC fans in the chamber with the light and put this problem behind you.
Also, your carbon scrubber dosn't work up there when you seal the room with a glass pane. You probably realised this. I'm under the impression alot of the bulb heat comes from the ballast. You have alot of of planning and reading to do.
RadaRada
Member
no confusion... updated pics
no confusion... updated pics
hey guys just to clear things up i am not confused about the scrubber. the reason my 80 CFM duct fan is uptop in the previous picture is because i was using it there temporarily until i purchased another PC fan.
my current^ ventilation setups go like this:
-two pc fans one intake one exaust to vent the light hood
-one pc fan to vent the grow area which i will hook up to a scrubber when the plants start smelling, if this doesnt scrub and ventilate properly, then i am going to reinstall my 80 CFM duct fan to replace it as the growing area exaust / scrubbing fan.
when i leave the door open to my closet the temps in my cab are around 80-85 F right now so all is going well
here are updated pics of the DP and HH and the bag seedlings the one already sprouted from the soil was planted yesterday and the other two were planted earlier today so they havent sproted yet.
I will be doing more research on the proper glass to install so i will let you guys know when i figure that out.
PS
the durban poison's (the one on the left) leaves are turning yellow on the bottom if anyone can help me figure out why that would be great
here are things that i think might be the cause:
-my grow area exaust fan fell for about a day so the leaves may have turned yellow due to improper ventilation / serious heat
-maybe its some sort of nute deficiency.... i dnt think this is the case
- possibly being burned because they are too close to the light
also the hollands hopes leaves are all pointing up, does that mean there is something wrong? the only reasons i could think of for this are the same reasons listed above
lemme know what you think
no confusion... updated pics
hey guys just to clear things up i am not confused about the scrubber. the reason my 80 CFM duct fan is uptop in the previous picture is because i was using it there temporarily until i purchased another PC fan.
my current^ ventilation setups go like this:
-two pc fans one intake one exaust to vent the light hood
-one pc fan to vent the grow area which i will hook up to a scrubber when the plants start smelling, if this doesnt scrub and ventilate properly, then i am going to reinstall my 80 CFM duct fan to replace it as the growing area exaust / scrubbing fan.
when i leave the door open to my closet the temps in my cab are around 80-85 F right now so all is going well
here are updated pics of the DP and HH and the bag seedlings the one already sprouted from the soil was planted yesterday and the other two were planted earlier today so they havent sproted yet.
I will be doing more research on the proper glass to install so i will let you guys know when i figure that out.
PS
the durban poison's (the one on the left) leaves are turning yellow on the bottom if anyone can help me figure out why that would be great
here are things that i think might be the cause:
-my grow area exaust fan fell for about a day so the leaves may have turned yellow due to improper ventilation / serious heat
-maybe its some sort of nute deficiency.... i dnt think this is the case
- possibly being burned because they are too close to the light
also the hollands hopes leaves are all pointing up, does that mean there is something wrong? the only reasons i could think of for this are the same reasons listed above
lemme know what you think
irie4i
Member
Leaves pointing up in my experience are a good thing. I've had some seedlings turn yellow/white leaves from PH issues and over-watering. Heat/under-watering could seem like a similar problem. Maybe you want to use something to protect the soil from heat(mylar cutouts, hydroton, peralite are all things I've seen), the infirmary section of the forum can help you the best with this kind of thing. It's also imaginable the stress is kind've alot for her at the moment. I know LSTing with soil is kind've a touchy process; I'm lucky enough to use hydro but from what I know about soil LST and stem growth it involves using LST when the plant is more dry(I guess).
RadaRada
Member
i am currently looking at hydroponics stores all over the internet for one that carries tempered glass panes, the only ones that i can find come with complete HPS systems, i need a tempered glass pane that is 10" x 20"
if anyone has any links to hydro stores or even glass stores that would be great
if anyone has any links to hydro stores or even glass stores that would be great
https://www.discount-hydro.com/productdisp.php?pid=665&navid=41
HFSBLENS HydroFarm Mini System Glass $15.95
Call em and double check but I think it's same dimensions.
HFSBLENS HydroFarm Mini System Glass $15.95
Call em and double check but I think it's same dimensions.
RadaRada
Member
update
update
i have decided to switch to 12/12 on july 10, i realize that that will only give those seedlings i planted 30 days to veg, but i want to flower the DP and the HH before i go back to college at the beggining of september.
and if i do the switch then it will have given the durban poison and hollands hope 55 days to veg and 50 days to flower and the two seedlings 30 days to veg and 50 days to flower but i shouldve thought of that before i planted them :/
update
i have decided to switch to 12/12 on july 10, i realize that that will only give those seedlings i planted 30 days to veg, but i want to flower the DP and the HH before i go back to college at the beggining of september.
and if i do the switch then it will have given the durban poison and hollands hope 55 days to veg and 50 days to flower and the two seedlings 30 days to veg and 50 days to flower but i shouldve thought of that before i planted them :/
