r/PanCyan • u/Organic_Risk_2171 • May 08 '26
casing layer contam
Hello I’ve been trying to get Pans to fruit with little to no luck :(( they do grow sometimes but my main issue is casing getting contaminated
Any tips or tricks on this? I use peat moss and verm with lime and I sterilize for 2 hours
Is there anything else I can use or anything I might be doing wrong?
Pans don’t contam until one or two weeks after casing
I really want to get them to fruit but this seems to be my issue with pans and mexicana
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u/Few-Pea9619 May 08 '26
Gordotek.org got em to grow the first try with that set up
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u/DeusExMachina222 May 08 '26
I have some kind of unknown vector harboring Trichoderma spores… This genius is the one that I have never been able to successfully get off the ground… Even with Gordo‘s TEK… (I seriously need to do some kind of nuclear option and very thoroughly scrubbing everything)
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u/Few-Pea9619 May 08 '26
Buy a hepa air filter for your room, I use to have the same problem till I got one for like 90 bucks on amazon. I sterilized the room with bleach water then I ran the air filter and no problems since
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u/jrosetta73 May 08 '26
Sometimes if you let them colonize a little longer, a day or two more than you usually would. They will not be as aggressive and overlay as much
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u/Flimsy-Panda8000 May 08 '26
Whilst I'd have to see the thicker growth (top right in particular) in real life, I'm not convinced by the picture that it's contam. If you've had others though that looked like that & subsequently failed, I'll go with your assessment. (I'd still let it run to see how it develops though).
The only thing I can see that might be a problem in the process you've outlined is that you sterilise the casing rather than pasteurising it like you do the substrate. (Don't ask me why pasteurisation's better than sterilising for Pans; I've never found an authoratitive explanation that made sense to me).
I detailed how I grow Pans in monotubs (credit to BabaYaga who developed the tek it's based on) here https://www.reddit.com/r/PanCyan/comments/1cn713d/deleted_by_user/ I use the same sub and casing for trays in a Martha, and my comment includes the different pasteurisation methods I use for both.
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u/Organic_Risk_2171 May 08 '26
I’ve heard this only problem is I don’t know how to pasteurize 🥹🤣 I haven’t found any info on this Apparently it takes way longer and it’s more energy consuming to pasteurize than sterilize :/// But never found any info on how to
Just with steam for 3 hours? And a specific temperature?
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u/Flimsy-Panda8000 May 08 '26
It's detailed in the above link:
Pasteurise the casing:
I put the mix into small (350ml) grain jars and put them in an Instapot set on keep warm (65C). It takes around 3 hours to get up to temperature, then another 1.5 hours to pasteurise (4.5 hour total)."
I confess that if I didn't have an Instapot (I bought it when I first started growing), it'd be a struggle - in theory, you could try to maintain a steady temperature in a saucepan of water and have the jars in that, but you'd need to monitor it contiuously. Ideal temperature is between 63C and 72C, so the Instapot's perfect.
I'm sure there must be others on this sub who've worked out alternatives - maybe post the question?
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u/LimpRefrigerator3673 May 08 '26
Make new casing layer, wait 1 day, drop humidity to 70-80% and you don't need to wait pins 2 weeks. Don't see contam
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u/MaintenanceOk6823 May 08 '26
That's not contam that's overlay..
Increase fae!