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ArthurSalenez said:
I was thinking about using some wet perlite and pouring it in a boiling pot with a plastic box placed on top to warm up my jars using a external pan warmer. Is this a good idea?

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Elevated said:

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ArthurSalenez said:
I was thinking about using some wet perlite and pouring it in a boiling pot with a plastic box placed on top to warm up my jars using a external pan warmer. Is this a good idea?

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and do that how many times a day???  I'm not sure about that but i do know some people use fish tank heaters in a sterlite tub with water...then put another tub into that/w the jars if your temp is low...if your temp gauge is right the jars should colonize @ 70 degrees just fine...thats what my last set of jars was @...It's recommended that they are a little higher..75-85 degrees but 70 should be fine..check your other procedures before assuming it's the temp...

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mrspirit2 said:


If it is too cold, keep them in a warmer room and wrap those fuckers in blankets to keep any heat in.

But I agree, 70 degrees should still produce growth..I'd check your other procedures first!

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ROGER5676 said:
70 is fine. thats what my house is at in the winter. even colder at night.around 62. the only thing i have noticed is it takes a few extra days to fully colonize.

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mrspirit2 said:
Any type of insulating material to keep what little heat you have where you want it.

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FRES said:
reptile heating pads work too

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I have found little to no difference in colonization speeds between 75 and 81F. Growth falls off rapidly at 83F and above, not 87F. That chart above is bogus, period. I have tried dozens of times to duplicate it and it can't be done. It was apparently made by someone who did ONE grow with sloppy note taking, and sent the results to Paul. Growth is much slower in cold temperatures until you hit 69F, where it speeds up quite a bit until about 75F, where it remains 'flat' until 81, then is flat again until 83, where it falls off fast beginning at 84. By 'flat' I mean there is no discernible increase or decrease in rate of growth within those ranges. Jars will colonize as fast at 75F as they will at 80F. I've proved this time and time again with every strain in my collection. Growth also falls off rapidly above 84, and this is why so many new folks have problems with incubators set at 86F, and jars that 'won't colonize'. The figures I give are substrate temperatures, not air temperatures. The temp inside the jar is 1 to 5 degrees higher than the surrounding air, depending on where in the colonization cycle the jar is. The heat produced falls off fast as the jar approaches full colonization. If you live in an igloo, (or near the waterfront) by all means build an incubator, but keep it in the normal room temperature ranges for best results. I see no reason to set one above 80F, and lots of reasons not to.

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Let me tell you guys a story. My fellow moderator Roadkill and I were filming a video segment on pf jars over at my brother's house a month or two ago. Later that day, my non-mycologist brother moved everything we left behind out to his garage, jars included, just to get them out of the way. I told him it didn't really matter, as I just wanted to film the process of making/inoculating the jars. Three weeks later, I went over there and guess what? All of the jars were fully colonized. The temperature of his garage during this time varied from the mid 30's to the low 50's. (He lives about 50 miles from the Canadian border) So, if properly made pf jars can colonize in three weeks at those low temps, why bother with silly incubators?

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ArthurSalenez said:
Thanks for the info guys. Really appreciate the help

http://www.presentsforyou.com/hp01rbconair.html?ci_src=14110944&ci_sku=HP01RB

I got this, best one I could find

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ArthurSalenez said:

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ROGER5676 said:
70 is fine. thats what my house is at in the winter. even colder at night.around 62. the only thing i have noticed is it takes a few extra days to fully colonize.

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Wow, my jars can't colonize for crap. I'm starting to wonder if I'm doing something wrong. I have nightmares about it unfortunately, like I'll never get that white celly web of glory. I feel like growing shrooms is impossible.

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