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Shop: North Spore Bulk Substrate, Injection Grain Bag   Original Sensible Seeds Bulk Cannabis Seeds

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OfflineClassicCaps
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Registered: 01/23/19
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Last seen: 3 years, 2 months
Pasteurization Confusion
    #26701521 - 05/28/20 10:50 AM (3 years, 8 months ago)

Hello Family this is my first post ever. apologies for any etiquette mistakes i make here.
So as a newbie after doing my obligatory pf tek run, it was time to start my bulk adventures. in my lack of knowledge i went ahead and sterilized my bulk sub (coir, verm, homemade hpoo based compost) in oven bags in a PC. everything went great, did 8 tubs with no contamination before the 1st flush and was very happy.
took a break for a while because i had more than anyone ever needs. when i came back for another attempt i learned about pasteurization and gave it a shot. everything went according to plan until 6 out of 7 tubs contaminated during colonization. i did this 3 more times trying 145, 165, and eventually 180 with the same results. very discouraging wasting all that time and materials.
i understand that my problem was likely my spawn but i want to know if anyone has any strong opinions about pasteurization when it comes to bulk substrate. I am going to make new grain jar lids (i have polyfill design) with sfd's and incorporate the smell test before spawning to bulk. any other ideas? thank you


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OfflineSockadin
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Registered: 01/03/10
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Re: Pasteurization Confusion [Re: ClassicCaps]
    #26701538 - 05/28/20 10:57 AM (3 years, 8 months ago)

Tell us about how you pasteurized your bulk sub. It's probably the spawn but I'm just curious on your method.


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OfflineClassicCaps
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Re: Pasteurization Confusion [Re: Sockadin]
    #26701702 - 05/28/20 12:09 PM (3 years, 8 months ago)

i have a large Yeti style cooler that i place in the bath tub. inside i have a 1000w bucket heater plugged unto an inkbird temperature controller as well as a small circulating pump. substrate is in wide mouth quart jars with foil as lids with the ring screwed on. i place a digital thermometer in the center of one of the jars to monitor substrate temp. i then place a tote lid over the 18 jars and cover the tote lid with a logging chain to weigh the jars down. i turn my house hot water heater up all the way and fill cooler 3/4 way up the jars. then i turn on the temperature controller and close the lid and the bucket heater gets to work heating up the water. i leave the water at 180 or so until temp starts to rise then adjust as necessary while monitoring substrate temperature. i tried different amounts of time up to 120 min. left it to cool to 80 degrees and immediately spawned


Edited by ClassicCaps (05/28/20 12:11 PM)


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OfflineA.k.aM
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Re: Pasteurization Confusion [Re: ClassicCaps]
    #26702232 - 05/28/20 04:54 PM (3 years, 8 months ago)

I know some guys like to let pasteurized manure sit for a few days before using it to let the microbes recover, but I don’t think that’s a necessary step.


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LAGM2020


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OfflineClassicCaps
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Registered: 01/23/19
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Re: Pasteurization Confusion [Re: A.k.a]
    #26705825 - 05/29/20 09:30 PM (3 years, 8 months ago)

i will try that next time i use manure. thanks :thumbup:


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