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Offlinejawache
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Registered: 04/29/21
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Why do my grain jars have a vacuum?
    #27286505 - 04/29/21 11:42 AM (3 years, 8 months ago)

New to growing, the second batch of grain jars I've made. This batch had a vacuum after PC (and cooling) when I stuck the syringe in it sucked the whole 10CC out in one go!




I cracked open the lid and it was a tight vacuum, is my blue syringe filter broken? I was under the impression it would let air in as it cooled etc... I do see growth but feels very slow so far.

The first batch of jars were fine, no vacuum and the mycelium is growing well, wondering what I did wrong for the second batch to make the vacuum.

Oh the one thing I did do differently in the second batch is that I forgot to cover them with foil in the PC so some water may have gotten into the syringe filters. Do you reckon that was it? Or did I mess up how I made the jar lids.

Cheers!

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OfflineProfessor X
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Re: Why do my grain jars have a vacuum? [Re: jawache]
    #27286546 - 04/29/21 12:17 PM (3 years, 8 months ago)

That's a liquid culture gas exchange filter. That's not for grain jars. Your jar will stall if you use that lid. IF you opened a jar under vacuum not in front of a flowhood it's probably already toast anyways, you sucked in contaminants when you opened it.


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Offlinejawache
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Re: Why do my grain jars have a vacuum? [Re: Professor X]
    #27288650 - 05/01/21 04:03 AM (3 years, 8 months ago)

Ahh, interesting thanks!

The first non-vacuum batch kinda stalled now that you mention it, they colonised most of the jar but just stopped at like 2/3.


They did advertise it for grain jars but let me reach out to the people I bought it from and ask: https://archersmushrooms.co.uk/product/13mm-0-22um-syringe-filter/

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Invisiblemyc_ousin_vinny
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Re: Why do my grain jars have a vacuum? [Re: Professor X]
    #27288745 - 05/01/21 06:49 AM (3 years, 8 months ago)

Hey Professor X. Why would that gas exchange filter not provide enough ge for grains?


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Invisiblesandman420
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Re: Why do my grain jars have a vacuum? [Re: myc_ousin_vinny]
    #27288747 - 05/01/21 06:53 AM (3 years, 8 months ago)

It's fine plenty of rascals with gadgety ways have those syringe filters on grain lids. Not that I would recommend it, I'm a easy polyfil guy.

Yours is plugged up or otherwise not working if it held a vacuum in the jar.


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Edited by sandman420 (05/01/21 07:19 AM)

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InvisiblebodhisattaMDiscordReddit
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Re: Why do my grain jars have a vacuum? [Re: myc_ousin_vinny]
    #27288796 - 05/01/21 07:41 AM (3 years, 8 months ago)

Quote:

myc_ousin_vinny said:
Hey Professor X. Why would that gas exchange filter not provide enough ge for grains?



Its a syringe filter. Requires pressure for gas/liquid to pass thru. Not really a gas exchange filter.

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Invisiblesandman420
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Re: Why do my grain jars have a vacuum? [Re: bodhisatta]
    #27288839 - 05/01/21 08:24 AM (3 years, 8 months ago)

Looking at the silicone dollop under it I'm betting you accidentally nicked a little silicone inside the connector when putting it on the lid and plugged it up.

I've certainly seen a few people using them over the years. Probably the worst of available filters but I've seen it work.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed

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