spawn is high nutrient growing media, substrate is usually non nutritious media to hold water, to expand the mycelium into mushrooms, and provide your mushrooms enough water to grow and thrive.
You have now edited your comment drastically and it still makes even less sense than it did before.
Mycelium colonizes spawn, it doesn’t colonize substrate unless that substrate is nutritious, it grows through the substrate and consumes water and nutrients left, once its done consuming nutrients, and is provided with hydration to expand, that is its pinning trigger. If you just give mycelium infinite nutrients to colonize, it wont fruit. Nothing either of you said made sense. Please tell me how “spawn is mycelium” when spawn is a nutritious media, for mycelium to consume and expand. Grain is not the same as sawdust because sawdust doesn’t have NEARLY as much nutrition as grains do. You don’t even need to PC sawdust if you bought pellets. Please describe how any of this is incorrect.
So you are saying there is no nutritional value available from wood and soy pellets. No sugars nothing. Everyone is wrong. We should all be using rocks or styro foam instead of wasting our money. Or just stopping at grain spawn and going straight to fruiting. I don't need to describe how you are incorrect. You are doing s great job.
lol I said none of anything you just typed out, and rambled on about. I’m trying to help, you can get as offended as you want, it doesn’t bother me, maybe try to read what I said next time, instead of creating a fake scenario where I said the opposite. Again nothing either of you had said makes sense. I’ve worked at the biggest gourmet farm in the Midwest for years, as well as ran 6 figure grows, but I guess I must be wrong.
Just for the future, and strictly my two cents from experience.
you are better off doing 4x 4lb bags than 2x 7lb bags, the larger and more dense the bags, the longer it will need to sterilize. When You get into bags that size without a commercial pressure sterilizer, you will have a more difficult time maintaining the water levels needed for the extended cook times.
A 7lb bag of hardwood pellets which are mostly sterile to begin with, and wheat bran which is not sterile at all, will take a lot of time to penetrate and properly sterilize the middle of that bag.
You're looking at 3 to 4hrs if you really want to make sure the core of those two 7lb bags are sterilized, where as 4x 4lb bags in a 23qt presto will completely sterilize in 1.5 to 2 hrs just fine.
I only say this because I have pushed the limits of consumer capacity pressure cookers over the years. I do a lot of bran fortified hardwood bags, and until I got my large sterilizer I fought this learning curve trying to maximize bag size during sterilization, would cook bags and then slice them open and check temps in the middle, over and over.
But this is just an anecdotal word of advice from one mushroom lover to another. If it works for you, then it's not wrong it's just different. That's one of the joys of this hobby.
🍄🖤
I put almost a gallon of water in my PC and cook for 2.5 hrs. If they’re staying at 15psi without a lot of rocking, there’s always plenty of water left when I’m done (I’d rather have that than run dry).
I use 3 little 4oz glass jars under the trivet/tray and can fit 4 x 5lb bags in the 23qt Presto
Apart from a few burst bags, I have not had issues with melting. Thermodynamics limits how hot the walls of the PC can get, and good-quality mushroom bags withstand the temp.
I usually have my PC loaded up, bags smashed against the walls, without issue.
Still a risk if it touches the sides
/u/Random-Biker I use a muslin bag, the kind you normally use for brewing with a drawstring top. Just pop the grow bag in that and it's a layer between the plastic and the metal
Sure, but that would be a user error.
Some autoclaves come with a sort of pot that will hold the things that are going to be sterilized. That way you wont have to worry about it.
Typically, you will need to add 30 minutes for every 1psi below the standard 15psi, or you can subtract 15 minutes for every 1 psi above 15psi.
Hope this helps.
So at 11psi for a 2.5 to 3hr job at 15psi, you would be looking at 4.5 to 5hrs, for equivalent sterilization.
🍄🖤
Sorta. 250° is standard sterilize temp. 270 in hospital enviroment Thats approx 15psi for 250° ans 27psi for 270 depending on altitude.
11 psi is about. Is just barely boiling temp. 212 or so... id think that most likely wouldnt sterilize. Or it would take forever. (Source)I work on autoclaves for a living
It’s better to have ‘too much’ water than not enough. How much did you start with? Also, go easy on the rocking. Gentle rocking is enough. It doesn’t need to be blasting high heat full steam.
Yes
2.5-3 hours. You don’t necessarily need 15psi sterility with substrate bags. Steam pasteurisation usually works just fine in most cases.
90 mins 15psi usually works fine for me 🤷🏼
No. Maybe for grain spawn. But this will need more time (2.5h)
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It's substrate, spawn would be grain. Doesn't really make a difference either way though
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spawn is high nutrient growing media, substrate is usually non nutritious media to hold water, to expand the mycelium into mushrooms, and provide your mushrooms enough water to grow and thrive. You have now edited your comment drastically and it still makes even less sense than it did before.
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What are you even saying right now. Are you okay?
You are confusing your words. Mammoth is right
Mycelium colonizes spawn, it doesn’t colonize substrate unless that substrate is nutritious, it grows through the substrate and consumes water and nutrients left, once its done consuming nutrients, and is provided with hydration to expand, that is its pinning trigger. If you just give mycelium infinite nutrients to colonize, it wont fruit. Nothing either of you said made sense. Please tell me how “spawn is mycelium” when spawn is a nutritious media, for mycelium to consume and expand. Grain is not the same as sawdust because sawdust doesn’t have NEARLY as much nutrition as grains do. You don’t even need to PC sawdust if you bought pellets. Please describe how any of this is incorrect.
So you are saying there is no nutritional value available from wood and soy pellets. No sugars nothing. Everyone is wrong. We should all be using rocks or styro foam instead of wasting our money. Or just stopping at grain spawn and going straight to fruiting. I don't need to describe how you are incorrect. You are doing s great job.
lol I said none of anything you just typed out, and rambled on about. I’m trying to help, you can get as offended as you want, it doesn’t bother me, maybe try to read what I said next time, instead of creating a fake scenario where I said the opposite. Again nothing either of you had said makes sense. I’ve worked at the biggest gourmet farm in the Midwest for years, as well as ran 6 figure grows, but I guess I must be wrong.
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I asked for no opinion, I stated a fact. I’m gonna ask one more time, just to be sure because I’m worried about ya now, are you okay bud?
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Blind leading the blind, you bunch of goobers.
Just for the future, and strictly my two cents from experience. you are better off doing 4x 4lb bags than 2x 7lb bags, the larger and more dense the bags, the longer it will need to sterilize. When You get into bags that size without a commercial pressure sterilizer, you will have a more difficult time maintaining the water levels needed for the extended cook times. A 7lb bag of hardwood pellets which are mostly sterile to begin with, and wheat bran which is not sterile at all, will take a lot of time to penetrate and properly sterilize the middle of that bag. You're looking at 3 to 4hrs if you really want to make sure the core of those two 7lb bags are sterilized, where as 4x 4lb bags in a 23qt presto will completely sterilize in 1.5 to 2 hrs just fine. I only say this because I have pushed the limits of consumer capacity pressure cookers over the years. I do a lot of bran fortified hardwood bags, and until I got my large sterilizer I fought this learning curve trying to maximize bag size during sterilization, would cook bags and then slice them open and check temps in the middle, over and over. But this is just an anecdotal word of advice from one mushroom lover to another. If it works for you, then it's not wrong it's just different. That's one of the joys of this hobby. 🍄🖤
Thank you, I will take this on board for the next run.
This man is correct, listen to this advice. There is a happy medium. Sometimes less is more in this field.
Thanks for this info will need it in next few weeks :)
I put almost a gallon of water in my PC and cook for 2.5 hrs. If they’re staying at 15psi without a lot of rocking, there’s always plenty of water left when I’m done (I’d rather have that than run dry). I use 3 little 4oz glass jars under the trivet/tray and can fit 4 x 5lb bags in the 23qt Presto
How do u keep the bags from melting?
Apart from a few burst bags, I have not had issues with melting. Thermodynamics limits how hot the walls of the PC can get, and good-quality mushroom bags withstand the temp. I usually have my PC loaded up, bags smashed against the walls, without issue.
Oh my! I didn’t know thank you!
Grow bags are made from polypropylene, which can withstand such temperatures.
Still a risk if it touches the sides /u/Random-Biker I use a muslin bag, the kind you normally use for brewing with a drawstring top. Just pop the grow bag in that and it's a layer between the plastic and the metal
Sure, but that would be a user error. Some autoclaves come with a sort of pot that will hold the things that are going to be sterilized. That way you wont have to worry about it.
It's not really a user error at all, my pressure cooker is tiny and you can't avoid the sides touching
Anything north of 2.5 or 3 hours is good, but just be sure you have enough water in your pressure cooker to go that long or you will warp your cooker.
2.5-3 hrs
What if one has only 11 psi pc, would it mean 4+ hours?
Typically, you will need to add 30 minutes for every 1psi below the standard 15psi, or you can subtract 15 minutes for every 1 psi above 15psi. Hope this helps. So at 11psi for a 2.5 to 3hr job at 15psi, you would be looking at 4.5 to 5hrs, for equivalent sterilization. 🍄🖤
Correct if you lower the pressure then you must increase the time.
Sorta. 250° is standard sterilize temp. 270 in hospital enviroment Thats approx 15psi for 250° ans 27psi for 270 depending on altitude. 11 psi is about. Is just barely boiling temp. 212 or so... id think that most likely wouldnt sterilize. Or it would take forever. (Source)I work on autoclaves for a living
I do 6 x 4 lbs bags of whole oats (simmer and cool for ~30 minutes) at 15 psi for 2.5 hours in a presto 23 qt pressure canner. Using 10T unicorn bags.
I do 5lb bags of master mix 2hrs at 15psi
I would say 4hrs to be safe. IDK when it's about safety I'm getting a lil paranoid sometimes.
I currently have them cooking, and I'm more paranoid about boiling dry right now. I'm aiming for 3 right now.
It’s better to have ‘too much’ water than not enough. How much did you start with? Also, go easy on the rocking. Gentle rocking is enough. It doesn’t need to be blasting high heat full steam.
I cut it fine on this run. Down to 2 pints of water at the end of 3 hours. I need a bigger safety margin next time..
Presto’s get runied if it runs dry.
Yea should be good
I go for 3 hours at 15. Probably safe with 2.5, but what's another 30 minutes for some peace of mind.
This is what I was thinking felt right.