12/12 from seed, stealth cab, SCROG grow

On 6/19/12 i put eight seeds of three different strains into MG organic soil with MG perlite mixed in. Its now 5 days in and still no plants sprouting out of the ground but should see them come up pretty soon. This is going to be a 12/12 from seed grow and i have a screen placed in the cab for the SCROGing later on. right now there is only one 24w cfl in the cab for the seedlings but i can put three more in once they get bigger and i can get more air flow into the cab. Im having heat problems and im not sure why, i have 4 computer fans pushing fresh air into the cab from the bottom and coming out of the top. with a fan inside the cab circulating air. I want to put another computer fan in as exhaust also. I planted 8 seeds and i hope to keep at least 2 of the plants in the end. Once they need nutrients I have 2-7-7 MG cactus food nutes. also i will be feeding small doses of a honey/molasses mixture every three or four waterings later on. Also the inside of the cab is lined with milar for reflecting the light. Does anyone have any ideas on how to bring the heat down inside of the cab? Right now its at 85 with only one light. The ambient temperature is between 65-70 degrees.

first to sub

2nd to sub
you might have too much intake and not enough exhaust??? Looks good I like the cab... how big are the pots you're going to use for final product??? stay high

Ummm thinking some solo cups, depends on how many plants are left in the end. if theres three or less im going to use larger containers then the solo cups. and yea i was thinking that there was not enough exhaust also. so im going to make the spot where it comes out bigger, and throw a PC fan over it to push more air.

ҖҗlegilizeitҗҖ;7619647 said:

Ummm thinking some solo cups, depends on how many plants are left in the end. if theres three or less im going to use larger containers then the solo cups. and yea i was thinking that there was not enough exhaust also. so im going to make the spot where it comes out bigger, and throw a PC fan over it to push more air.

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good thought you want more exhaust than intake... negative pressure is important. stay high

whats the advantages to positive or negative pressure? because right now my cab is really positively pressurized.

you know I had some great info on this on my notepad... which is no longer there...
basically you are exhausting more air than what is coming in. in fact you can do no fans for your intake (known as passive intake). this can help to lower temps and humidity in your cab... the one thing you want to becareful of with negative pressure is to not over work your exhaust fans... you want a 2:1 ration exhaust to intake.
With too much intake and not enough exhaust well you are just cirrculating the warm air in the box and not getting rid of all of it... am I making sense?? hope this helps. If you need more info about this let me know stay high.

yeah i kind of get what your saying, but if the fans are pushing in air and at the top theres a hole where i can feel air flowing out of, isnt that working? or is just way more effective to use exhaust fans?

always better to have more exhaust than intake... imo... exchange rate is important... you want to exhaust a certain amount of air per 5 min intervals. so cfms is important... here is a post i did a while back
Read this

To control excessive heat build-up a ventilation system must be incorporated. This can be done simply with fans, or a carbon filter/fan combination that will clear odor and sterilize the area at the same time. Ideal Grow Room temperatures should be between 65*F and 75*F. If temperatures rise above 85*F your plants will begin to suffer from excessive transpiration, which is the loss of crucial water held within the leaves and stem cell walls. Another factor that ventilation will help control is the relative humidity level or RH of your growing environment. RH can also have an affect on transpiration. Proper humidity levels range from 45%-65% RH. A Thermometer/Hygrometer is a must to maintain proper levels. Some General Tips:
• Lighting systems generally consist of four components: ballast, cord and socket, bulb and reflector. A 400 watt lightwill cover a 3x3 or 4x4 area, a 600 watt will cover a 4x4 or 5x5 area, and a 1000 watt can usually cover up to an 8x8. Remember the more light you have, the more the plants can feed, thus photosynthesize and produce a fruitful yield.
• When air cooling lights, use at least 250 cfm per 1000 watts. (I THINK THIS SHOULD BE CLOSER TO 400CFM TO COOL LIGHT, just my opinion)
• Generally it’s a good idea to use 3000 btu of cooling energy per 1000 watts.
• Typically, you will want to exchange the air in your grow room every five minutes. To figure this out use the formula Length x Width x Height = Cubic Ft, then Divide by 5 to get your recommended CFM (Cubic Feet per Minute)
(Example 8ft x 12ft x 8ft = 768 divided by 5 = 153.6 so you would need at least a 153 cfm fan to exhaust your room)
Using Carbon Filters:
Carbon filters are great to use in your grow room. Since you need an air exchange any way, why not sanitize your room in the process? Match the CFM of the filter and fan, attach it to fan intake, and you are ready to go. All carbon filters have a recommended CFM; it is important not to exceed the recommended CFM as the filter will not sterilize the air properly. When mounting your carbon filter it is best to mount the filter high in the grow room to allow any hot air to be filtered first. If mounted and connected properly your fan and filter will accomplish three things:

• Act as an air exchange in your grow room
• Decrease the temperature by taking out hot air
• Sterilize grow room killing mold spores, pathogens, and deodorizing

Hope this helps!!! Stay HIGH!!!

thanks man. yea that was helpful, im deffenitly going to try to add like two exhaust fans at the top of the cab and see how much that helps, still wil be positive pressure in the cab with 4 intake to 2 exhaust but there will be some great air flow

let us know how it works out, if you still have temp issues change out another fan... again don't over exert your exhaust fans last thing you want to do is burn them out... stay high

fuck guys, just dug up one of the seeds to check for atleast a tap root, and nothing was growing yet. then i checked five of the other ones and none of them had any either. so im guessing the seeds where to old and wont grow.

call up the mids dealer.. "yeah i need a dub, the seedier the better" ive actually done this lol

ҖҗlegilizeitҗҖ;7624278 said:

fuck guys, just dug up one of the seeds to check for atleast a tap root, and nothing was growing yet. then i checked five of the other ones and none of them had any either. so im guessing the seeds where to old and wont grow.

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paper towel method, I actually use a wash cloth, slightly damp and in a dark drawer, leave for a few days and you should have some tap roots, just got to be careful because the tap root can get inner twined with the wash cloth... I don't think I've heard of seeds being too old. You'll get it bro, I have faith in your skills... stay high

yea i guess i could just wait out the seeds for alittle bit longer, just still not seeing anything which sucks.

ҖҗlegilizeitҗҖ;7628673 said:

yea i guess i could just wait out the seeds for alittle bit longer, just still not seeing anything which sucks.

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the more you phunk with them the less likely you are to get taproots and sprouting. Just let them sit, if you've got nothing after 2 weeks, you've got bum seeds. Otherwise pull em all out and germinate them in the paper towel and you'll usually always get results.

if u use 2 exhaust fans and have just passive intakes your temps will drop dramatically. im only using 2 120mm pc fans for my exhaust with a 250w hps. highest ive seen has been 31.8c. i never germ seeds in paper towels either, i just stick them in presoaked soil and keep it moist not completely soggy. usually see sprouts within 3 days.

What I do is just get a cup, fill it with water. Better yet, go buy some distilled water from the shops. 100% petrol stations sell them.
Pour in like 1 cm or 2 cm of water/or distilled water. Depends on the seeds, how good they are. I have seen seeds sprout, in a day.
I'd remember once I had rubbish seeds. Did the pre soak method, never sprouted. Transplanted the seeds into peat pellets. After 1 week, only one plant sprouted.

so i took out the seeds and put them in some water for 24 hrs now they are in some wet paper towels.