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Invisibletbagtag
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Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows
    #18313549 - 05/24/13 10:22 AM (10 years, 8 months ago)

I wrote this some months back it started getting some attention recently.  I have edited about 70% of the original post that was here.  This will cover making your substrate to field capacity using coir and pasteurization of the substrate.  Please ask away if you have any questions.

Why Is It Good?:

Its an electric roaster oven that has a temperature control.  It's only $20 and can be used anywhere you have an electrical outlet.  You don't have to worry about overheating your substrate.  I've done 10 tubs now using this method and haven't lost 1 yet.

The Bad:

It is a lot slower than the stove top.  On the stove it takes me about an hour for it to hit 160 in the center.  In the roaster it takes 2-3 hours for it to get to the temperature.

Things you need:

Bulk Sub Prep Tek Part 1: Hydration

Supplies needed:
2 Bricks Coco Coir (if bought at a grow shop make sure it wasnt treated with trich.  The easiest one to get is Eco Earth from and major pet store.  Works great for newbies)
Vermiculite preferable medium (sometimes referred to as grade 2), fine will also work.
Gypsum (pellets are a-ok)
2 gallons of water and 1 quart jar of water
A bucket with a tight fitting lid



This recipe will make more than enough substrate for 2 30ish qt mini monos or 1 large mono over 66qt.  When we are done I will give you tips for the leftovers.

Scale as needed

Step 1:
Take 6 qts vermiculite and put in the bucket



2 cups gypsum - put it in the bucket



Should look like this



With your hand mix it as well as you can while its dry.  This prevents gypsum clumps; especially with pelletized gypsum.  Should look like below when done.




Now add 2 bricks of Eco Earth, if using bulk coir each brick of Eco Earth weighs 1# 7oz.  So you will need 2# 14oz of bulk coir (yes i weighed all 3 bricks to find out)

Put this in the bucket.



Now pour 2 gallons of water and 1 quart jar of water in the bucket.  Put the lid on it and set your timer for 60 minutes.



If you do not wait the full 60 minutes you will get leprosy, shits toxic till at field capacity.  Well not really, just dont fuck with it for a full 60 minutes.

See you again in over an hour where we mix, test for field capacity and bag our sub for pasteurization.

Making Substrate Pt 2: Mixing and Pasteurization

Supplies needed:

Gloves
Oven Roaster
Gallon Ziploc Baggies
Paper Towel
Alcohol
Meat Thermometer

So this is what you're going to be greeted with when you take the lid off of your bucket.



The gloves are optional as this is messy as fuck.  The gloves just help with the cleanup and prevents any skin flakes or hair from your palms from getting in the mix.

We need to make sure we mix up the coir, verm and gypsum till it is even and there are no clumps of coir or pockets of verm.

One tip I give is pull from the bottom and build up along the side of the bucket and push down.  Keep fluffing and repeating, I usually spend 30-60 minutes mixing my sub to get it nice.  Take the time to do this right.  After it is all mixed together put the lid back on the bucket and wait 30 minutes.



This is how it should look all the way through:




This extra 30 minutes helps with the redistribution of water after the mix.

After 30 minutes test for field capacity.  When you pick up a clump no water should come out, when you squeeze you should have anywhere from a few drops to a small trickle.  If it is too much water you can add another half quart of verm - but if you follow my instructions above, mix properly and wait that extra 30 minutes you will be good.

Each bag can hold up to 4qts of substrate, since we are only working with 22 qts of substrate we are going to put slightly less than that in each bag.  Just try to make the bags as even as possible.  Do not worry if there is coir in the zipper area, when we use the bags when can use sterile scissors to cut below the zipper area.



Zip up the bags (slide style bags will not work for this. 

Assemble your roaster oven so it looks like below.  Put your bags in before the water.  Let out any excess air from the bags and re-zip. 



In the middle bag open the top slightly to put your meat thermometer in and zip the bag shut as best as possible.



Fill the roaster with water halfway up the bags and put the lid on.




Plug in your roaster and set the temperature to 160 degrees.  Check your meat thermometer after 2 hours, if you are not at 160 degrees on your thermometer check back in an hour and each hour after that (usually 4 hours to hit 160 degrees).  Once the center has hit 160 unplug the roaster (mine doesnt have an on/off), leave the lid on for 1 hour and then promptly remove the substrate to cool after that hour.

You just now pasteurized 22qts of substrate in 4 hours without having to stand over the stove.


Edited by tbagtag (09/05/13 04:10 PM)


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Invisibletoxetel
׀ǝʇǝxoʇ ●


Registered: 08/13/12
Posts: 708
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18718651 - 08/17/13 12:05 PM (10 years, 6 months ago)

Thanks for the writeup!

Do you find that the amount of time it takes to get the center of the substrate up to temp varies? Because I imagine that it would stay pretty constant as long as you're packing the substrate the same way. If that's the case, then you could probably forgo the periodic checking of temperature once you know how long you'll need to leave it in there. Add an appliance timer, and you'd have a completely hands-off pasteurization method!

Could you post the brand and model name/number of the roaster you're using?


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Offlinevolatilebunny
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Registered: 11/15/11
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Last seen: 4 years, 10 months
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18719675 - 08/17/13 04:58 PM (10 years, 6 months ago)

I'd imagine you could use a slow cooker with a 'high' and 'low' setting. I like the idea of how uniformly the cooker would heat the substrate.

I'm planning to just measure the time to warm up x quarts of water to 160 degrees. Then I can use a timer or digital thermometer to determine when the substrate is done.


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Invisibletbagtag
Boomer Barron

Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: volatilebunny]
    #18720153 - 08/17/13 07:15 PM (10 years, 6 months ago)

This write up I did a while back and didn't get too much interest in it.  I will be covering the process in full in my grow along thread.

The oven roaster is a Sunbeam brand that is normally $25 at walmart online but usually $20 in the store.  The most important thing is the temperature control.  The first batch always takes 4 hours, the second batch if you do it in succession of the first is 3 hours.  Each batch after that if you keep it going around the clock is 3 hours.

Having just a high/low setting I wouldn't recommend, not saying it wouldn't work but when you can get something with temperature control you dont need the digital thermometer, just a meat thermometer as its like clock work now on well over 100qts of substrate.


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Invisibleanne halonium
jaguarette
Female


Registered: 05/07/13
Posts: 1,908
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18720185 - 08/17/13 07:25 PM (10 years, 6 months ago)

i can see where it might work.
but im not getting the " secret grow part"

maybe im missing something,
but a steaming metal box of shit,
might be kinda a give away......


--------------------
:aliendance:


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Invisibletbagtag
Boomer Barron

Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: anne halonium]
    #18720200 - 08/17/13 07:32 PM (10 years, 6 months ago)

Quote:

anne halonium said:
i can see where it might work.
but im not getting the " secret grow part"

maybe im missing something,
but a steaming metal box of shit,
might be kinda a give away......






Its self contained, no odor, but I do coir and not shit.  Obviously if you're growing on shit you're not going to hide that smell very well.  But its self contained, only need a power outlet.

We get requests for stealth
This is one of low wealth
Power is all one needs

A lil water
Some jars
and 4 hours to succeed.


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Invisibleanne halonium
jaguarette
Female


Registered: 05/07/13
Posts: 1,908
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18720226 - 08/17/13 07:40 PM (10 years, 6 months ago)

Quote:

tbagtag said:
Quote:

anne halonium said:
i can see where it might work.
but im not getting the " secret grow part"

maybe im missing something,
but a steaming metal box of shit,
might be kinda a give away......






Its self contained, no odor, but I do coir and not shit.  Obviously if you're growing on shit you're not going to hide that smell very well.  But its self contained, only need a power outlet.

We get requests for stealth
This is one of low wealth
Power is all one needs

A lil water
Some jars
and 4 hours to succeed.





ill roll with my PP5's,
and AA910 in a soundproofed walk in closet, @ 40 minits to success.

im not convinced a toaster oven is best,
but, i will give ya, it pry would work.



--------------------
:aliendance:


Edited by anne halonium (08/17/13 07:48 PM)


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Invisibletbagtag
Boomer Barron

Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: anne halonium]
    #18720249 - 08/17/13 07:48 PM (10 years, 6 months ago)

Not a toaster oven.  Heres the link, its made by rival, fully submerge just like it should.  I don't have to worry about my hobby, I keep it contained to just not have it all over the place.  I've seen your threads and to each their own, as long as you get results that all that matters.  You're happy I'm happy and we have both helped people get results.

Edit forgot the link

http://www.walmart.com/ip/Rival-16-Quart-Roaster-Oven-Wide-Mouth-with-Basic-Lid/21578079



Edited by tbagtag (08/17/13 07:48 PM)


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Invisibleanne halonium
jaguarette
Female


Registered: 05/07/13
Posts: 1,908
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18720261 - 08/17/13 07:51 PM (10 years, 6 months ago)

oddly , im not as against this as it sounds.
as said, i can see where it would work,
and, it does have a cost element.

so, i can loosely endorse this one, based on circumstance.


my maid , really likes the idea, and,
thinks it sounds like an armoured halloween porch prank,
and ,says you rule.


--------------------
:aliendance:


Edited by anne halonium (08/17/13 07:55 PM)


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Offlinevolatilebunny
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Registered: 11/15/11
Posts: 11
Last seen: 4 years, 10 months
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: anne halonium]
    #18720470 - 08/17/13 08:52 PM (10 years, 6 months ago)

I think I'll build one of these to try out the method with my existing cooker.



http://www.delcollo.us/icp/crockostat.html

My stovetop has 4 discrete power settings instead of a dial (f'ed up, I know), so I'd like something that I can "dial in". But at $25, maybe getting one with a thermostat would be worth it.


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Offlinefreebananas
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Registered: 04/28/13
Posts: 504
Last seen: 9 years, 10 months
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: volatilebunny]
    #18720550 - 08/17/13 09:16 PM (10 years, 6 months ago)

The fact that it's fool proof makes this a great tek in my opinion.

How many jars can fit inside the one in your link?  Are there larger models that you know of?


--------------------
“To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me.”  Isaac Newton



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Invisibletbagtag
Boomer Barron

Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: freebananas]
    #18720635 - 08/17/13 09:35 PM (10 years, 6 months ago)

Quote:

freebananas said:
The fact that it's fool proof makes this a great tek in my opinion.

How many jars can fit inside the one in your link?  Are there larger models that you know of?





There are larger roasters available obviously at a higher cost.  I use ziploc bags so the time with jars may vary.  The model I linked is the one I have, its $19.99 in store, it also has a rack you can put your sub on, its a double boiler, doesn't get any easier to properly pasteurize.  I can fit 3 bags in there and that's approximately 12qts of substrate in 4 hours and another 12 in 3 more hours, with the perk I don't have to stand over it.  Once you get your run times down you can set it and forget it!


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Offlinefreebananas
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Registered: 04/28/13
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Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18720675 - 08/17/13 09:41 PM (10 years, 6 months ago)

Quote:

tbagtag said:
Quote:

freebananas said:
The fact that it's fool proof makes this a great tek in my opinion.

How many jars can fit inside the one in your link?  Are there larger models that you know of?





There are larger roasters available obviously at a higher cost.  I use ziploc bags so the time with jars may vary.  The model I linked is the one I have, its $19.99 in store, it also has a rack you can put your sub on, its a double boiler, doesn't get any easier to properly pasteurize.  I can fit 3 bags in there and that's approximately 12qts of substrate in 4 hours and another 12 in 3 more hours, with the perk I don't have to stand over it.  Once you get your run times down you can set it and forget it!




:thumbup:


--------------------
“To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me.”  Isaac Newton



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Invisibletbagtag
Boomer Barron

Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: volatilebunny]
    #18720758 - 08/17/13 09:55 PM (10 years, 6 months ago)

Quote:

volatilebunny said:
I think I'll build one of these to try out the method with my existing cooker.



http://www.delcollo.us/icp/crockostat.html

My stovetop has 4 discrete power settings instead of a dial (f'ed up, I know), so I'd like something that I can "dial in". But at $25, maybe getting one with a thermostat would be worth it.





If you're in the stats its even cheaper than that.  Its less than the cost of 2 digital thermometers and a fraction of the labor of the stove.  If you're in the US check out walmart itself, mine is usually cheaper than the site.  I got that same cooker for $19.99


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Invisibletoxetel
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Registered: 08/13/12
Posts: 708
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18721179 - 08/17/13 11:31 PM (10 years, 6 months ago)

tbagtag: Thanks for the link to the roaster. I guess pretty much any roaster would work as long as it's big enough and has a thermostat that goes down to 155 degrees.

volatilebunny: I don't think that kind of box would do the trick. I think you'd want an actual thermostat so it would maintain a constant temperature rather than just a reduced power output.


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Invisibletbagtag
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Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: toxetel]
    #18803957 - 09/05/13 04:10 PM (10 years, 5 months ago)

Added pics and updated the tek.


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Invisibletoxetel
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Registered: 08/13/12
Posts: 708
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18806354 - 09/06/13 06:44 AM (10 years, 5 months ago)

Nice, dude.

This may be a dumb question, but -- the link you gave is to a 16-quart roaster oven. Does the "16-quart" model really hold 22 quarts of substrate on top of a rack plus water to surround it? Or do you use a different model when you're doing 2 bricks of coir at the same time?

Also, I have a thought -- I know this would ruin the "hands-off" nature of this tek, but perhaps you could speed up the process by first setting the temperature higher than 150 (like maybe even 250 so the water would get as hot as possible) until the substrate temperature starts to rise, and then knock it back down? Kind of a compromise between this tek and FrankHorrigan's tek. I realize that would take away some of the convenience/simplicity of this tek but it would still retain the discreetness.


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OfflineXiC_clone
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Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: toxetel]
    #18806366 - 09/06/13 06:48 AM (10 years, 5 months ago)

This is really cool, great job!


--------------------
Don't soak your WBS dummy! There's an =>easy<= way.
For Your Health!


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Invisibletbagtag
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Registered: 01/16/13
Posts: 1,432
Loc: Amsterdam Flag
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: toxetel]
    #18806485 - 09/06/13 08:11 AM (10 years, 5 months ago)

Quote:

toxetel said:
Nice, dude.

This may be a dumb question, but -- the link you gave is to a 16-quart roaster oven. Does the "16-quart" model really hold 22 quarts of substrate on top of a rack plus water to surround it? Or do you use a different model when you're doing 2 bricks of coir at the same time?

Also, I have a thought -- I know this would ruin the "hands-off" nature of this tek, but perhaps you could speed up the process by first setting the temperature higher than 150 (like maybe even 250 so the water would get as hot as possible) until the substrate temperature starts to rise, and then knock it back down? Kind of a compromise between this tek and FrankHorrigan's tek. I realize that would take away some of the convenience/simplicity of this tek but it would still retain the discreetness.




16 qts is the amount of liquid the basin can hold.  Also the sub is going to extend about the water basin anyway so we aren't really filling the basin with the 22qts of sub but at the same time we are. Makes sense?


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Invisibletoxetel
׀ǝʇǝxoʇ ●


Registered: 08/13/12
Posts: 708
Re: Tbagtag's Oven Roaster Pasteurization Tek - Perfect for Secret Grows [Re: tbagtag]
    #18806674 - 09/06/13 09:24 AM (10 years, 5 months ago)

Yeah, gotcha. Thanks -- good to know!


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