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If you use a piece of pvc packed with poly fill and a turkey roasting bag..Can the pvc and poly be used over and over...Logic being it will be streilized every time pc'ed...Also would it be better to turn a groove around these so you could tie a string tight or a rubberband for a better seal...Or would duct tape be just fine....Thanks and peace....
-------------------- Respect all, Fear None! The Peacemaker
I have reused spawn bags, rather than turkey bags, over and over again in the way you are describing. I fill the bag with substrate, and pull the edges through a 2" diameter, 2" length pvc cut pipe (I file the sharp edges down). I then slide the pvc pipe down far enough over the bag towards the substrate so that I can fold down the edges over the pvc pipe. The pvc pipe slides down like a ring on a finger. After I fold the edges down over the pipe, I stuff a tennis ball sized wad of polyfil into the opening, and it makes a breathable filter, and uncompresses the spawn bag against the inside pvc pipe making an excellent seal. I always cover the filter with 2 pieces of tinfoil, and pressure cook for 2 hours (manure:straw:vermiculite).
When I'm ready to use the substrate, in a glove box I unassemble my filter, and my jar of spawn, and I dump 1 pint in. I've noticed that the pollyfil filter wad is pretty damp, but I stuff it back in anyways, and recover with tinfoil. Incubate at appropriate temperatures, and you'll be amazed...
Turkey bags ( I think they're polyethylene) after heating are very very delicate. Whenever I used turkey bags (which I don't anymore), the straw edges poked holes through the supersensitive, ultra heated bag. I moved up to polypropylene spawn bags from Sporeworks or mycomania, and continued using the same filter assembly so that I could reuse the expensive bags over and over... I've never had a bag go bad...
I notice after PCing that the pvc pipe morphs a bit, but is perfectly reusable also. The wad of polyfill, since it gets so moist, seems to draw mycelium up through it from the spawn, so I never reuse it.
Yah, i remember when that tek was posted.they used a section of a 30cc syringe for the same purpose. Mighta been sporeworks. I don't remember if they pc'd it or not. I'm glad you say pvc dosn't melt. May have to try that. i was thinking i'd have to use copper or something.
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