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OfflineKalypto
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Registered: 09/19/12
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Continual failure with spawn bags
    #18799734 - 09/04/13 03:30 PM (10 years, 4 months ago)

I PC for about 2 hour or more
I feel like a bag half full is way to much is it?
Maybe my impulse sealer isnt working
Should i keep it low or hot enough to melt to end off?
Any tips would be appreciated


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InvisibleJohnnieYen
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Registered: 03/15/11
Posts: 3,529
Loc: City Z
Re: Continual failure with spawn bags [Re: Kalypto]
    #18799743 - 09/04/13 03:33 PM (10 years, 4 months ago)

I put 4 quarts of grains per bag, PC for 3 hours once I hit 15 psi.

I use PP bag locks

so I can easily do G2G


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OfflineKalypto
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18799758 - 09/04/13 03:36 PM (10 years, 4 months ago)

wow 3 hours
No problems with them being dry?


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InvisibleJohnnieYen
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Re: Continual failure with spawn bags [Re: Kalypto]
    #18799772 - 09/04/13 03:39 PM (10 years, 4 months ago)

you probably have unsterilized grains in the center of your bag. Probably why your bags are going bad.

My grains are correctly hydrated pre sterilization and I have not had an issue with grains being too dry.

I usually do 6 bags at a time in my 75x with no problems


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InvisibleJohnnieYen
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18799781 - 09/04/13 03:42 PM (10 years, 4 months ago)

Quote:

RogerRabbit said:
I seal the filter patch bags with a piece of wire after inoculating.  I just wrap the wire around the end of the bag like a twist tie on a loaf of bread, after first inflating the bag in front of the flowhood so there is a plenum of sterile air within.

This allows me to open the bag in front of the flow hood at fruiting time to exchange the air, then seal it back up.

As said above, fold the bag over several times before PC'ing, then set a plate or something on top of the bags to press the folded seal flat.  I use no clothespins, only the flat seal which seems to work well as long as something is holding it closed.  Be sure to PC long enough as spawn bags hold more than jars.  When I PC four spawn bags with six pounds of spawn or wood chips/sawdust each, I go for 3 1/2 hours at fifteen psi.  Use some rings from your jars to stuff between the bags to separate them so steam can penetrate throughout the PC and on all sides of each bag.
RR




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OfflineKalypto
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18799836 - 09/04/13 04:00 PM (10 years, 4 months ago)

I really dont like having the bags after i take them out of the PC
I also dont have a flow hood yet)=)=


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InvisibleJohnnieYen
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Re: Continual failure with spawn bags [Re: Kalypto]
    #18799904 - 09/04/13 04:18 PM (10 years, 4 months ago)

Quote:

Kalypto said:
I really dont like having the bags after i take them out of the PC
I also dont have a flow hood yet)=)=




I'm not sure why you don't like PC'd bags? i thought that's what this thread is about.

I don't have a flowhood either, I just use a still air box. A small one too... I really have to build a larger one.

I turn 1 jar of colonized spawn and split it into 2 bags. This gives me 2 monotubs worth of spawn from a single jar. Colonizes in about a week to week and a half.

turning a dozen jars into 24 tubs is my kind of efficiency


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OfflineKalypto
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18799906 - 09/04/13 04:19 PM (10 years, 4 months ago)

Sorry I meant to say open bags


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InvisibleJohnnieYen
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Re: Continual failure with spawn bags [Re: Kalypto]
    #18799965 - 09/04/13 04:36 PM (10 years, 4 months ago)

Don't be afraid to open your spawn bag and do a quick G2G (in a SAB of course). This is why I don't use an impulse sealer for spawn bags.

A good Still air box and sterile technique is all you need.

I've only had 2 G2G's go bad (out of 50+)and that was most likely a bad jar.


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InvisibleSpitballJedi
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18799981 - 09/04/13 04:39 PM (10 years, 4 months ago)

I used bags for a bit, but found them to be a PITA.

Jars just seem so much easier.


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InvisibleJohnnieYen
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Re: Continual failure with spawn bags [Re: SpitballJedi]
    #18800034 - 09/04/13 04:50 PM (10 years, 4 months ago)

when dealing with multiple bins, expanding spawn with bags is a huge timesaver IMO



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Offlinejonnymushroom
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Re: Continual failure with spawn bags [Re: Kalypto]
    #18800047 - 09/04/13 04:51 PM (10 years, 4 months ago)

The more grain the longer it takes to colonize and greater chances for something going wrong .
The moisture is so important with grain I cant say it enough. If to wet failure is highly likely and especially with a large bag .

It not the impulse sealer I don't think, that is if you know how to use it. There not even a necessity. I use bag clamps they work great.

Get the grains moisture right because after 2 hours of pcing it can throw it off.


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InvisibleSpitballJedi
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Re: Continual failure with spawn bags [Re: JohnnieYen]
    #18800125 - 09/04/13 05:07 PM (10 years, 4 months ago)

The most I've ever had going at once is 16 monos with 6-7 qts each. I didn't even consider going back to bags. That's just me.:shrug:

I just find them to be cumbersome compared to jars.

Also, like jonnymushroom mentioned, it can be tricky for some people to get moisture right. It took me a few tries, but I got it.

I only brought the jar vs bag subject up for the OP. It's ok to change your mind and go back to tried and true methods; the methods that work well for you. You just have to ask yourself what it's all worth.


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A little civility goes a long way

The Noob Forum
The Hammock Hangers' Forum


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InvisibleFooMan
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Re: Continual failure with spawn bags [Re: Kalypto]
    #18800862 - 09/04/13 08:29 PM (10 years, 4 months ago)

Quote:

Kalypto said:
I PC for about 2 hour or more





PC times depend on the amount and density of the substrate being sterilized. 8 quarts of sub in a bag will need to be PC'd a lot longer than 1.


Quote:

I feel like a bag half full is way to much is it?




Technically, no. But IME I don't use more than 5 quarts of sub in any bag because otherwise it takes too long to PC and you have to experiment to see how long it'll take to get it sterilized. Huge bags also tend to generate a lot of heat as the mycelium colonizes, which can promote contaminants if the temps aren't kept in check.

Quote:

Maybe my impulse sealer isnt working
Should i keep it low or hot enough to melt to end off?
Any tips would be appreciated




Speaking from A LOT of experience, you need to hold the sealer closed for about 5 to 10 seconds AFTER you hear that "click" and the light shuts off on the sealer, especially if you are using a higher/longer heat setting. The heating element gets blazing hot for the few seconds the light is on, then shuts off. During the time the light is on the plastic melts and binds the top of the bag together in the process. If you open the sealer right away after the light clicks off the plastic is still hot and soft and more likely to stick to the teflon. If you give it 10 seconds to cool you'll have a nice seal and no melted plastic pulling up with the sealer arm.

Check the seal afterwards by giving each side a good tug along the length of the seal. If it breaks apart, turn the temp up a bit and repeat the process until you get a good seal. Make a note of the setting on your sealer that worked and use that same setting in the future. I don't recommend cranking the dial all the way up unless you have to since the heating element will wear out much faster that way.


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