lightingnerd
Nice! Yeah, I mostly want it for convenience of working with agar–but the need just isn’t there yet. I’m considering a redneck version using one of the 4" thick MERV 12 filters, which are rated to filter 0.3um particles, just not 99.99% of them. I know for a fact it would be much better than my SAB in terms of contamination risk, and I’m considering building my own wooden impeller fan, so if I can scrap an old high RPM motor–I may be able to finagle a basic FFU together for under $50.
True, it’s always good to verify with academic articles. I’d never trust ChatGPT without also verifying with sources–if for no other reason than its training dataset was cutoff in 2021. It’s generally good to seek out research that is less than 3-5 years old when possible, due to how quickly the scientific landscape changes. According to this particular article from 2019, ChatGPT’s response was pretty accurate.
https://onlinelibrary.wiley.com/doi/full/10.1002/ejlt.201900101
Random trivia: it’s actually not the liquid water that matters, it’s the water vapor due to the pressure-temperature relationship of water in the gas phase (since gasses are significantly more compressible than liquids). It’s also important to note that water vapor does not behave like an ideal gas above ~1.5PSI, and it has a different temperature-pressure curve than gasses like N2, O2, and CO2, which is why you need to purge air at the beginning of the canning process in order to achieve a high enough temperature.
…and yeah, it’s crazy how altitude and atmospheric pressure matters, the weight of the air around us is literally pushing down on the rocker weight, affecting the relative internal pressure.
Thermodynamics is pretty awesome! XD
When I use the word “expanding”, I am referring to “increasing in volume”. So you could just “expand your spawn” (making more spawn), or “expand to bulk” (inoculating your fruiting blocks). Oh, and definitely try to find actual fuel pellets if you can, they’re usually much cheaper per pound than food-grade BBQ smoking pellets. I have found the basic fuel pellets at stores like Tractor Supply Hardware, but you have to ask an employee to check the stock in the back (since they’re out of season).
If you do end-up buying hardwood smoking pellets, be wary that some smoking pellets can contain additives like molasses, which means too much sugar for basic pasteurization with Lipa’s Tek–so always check the ingredients with smoker pellets.
A cheap and easy method for expanding spawn is Lipa’s Tek. Renegade Mushrooms goes over the method in this youtube video: https://www.youtube.com/watch?v=HD_k-dAyE5Y
Basically a 40 pound bag of Hardwood Fuel Pellets (make sure they’re hardwood) can go for around 6-7USD. If you’re in a pinch, want a specific species of tree, or want certified organic, you can find hardwood pellets for smoking meats that go for somewhere around 0.50USD/lb in 20-40lb bags.
The reason this method works is that fuel pellets have less sugars and starches, and they are already partially pasteurized in the pellet press. So, as long as your pellets are stored well, a two-hour pasteurization at 200F is more than enough to get rid of most of the competing organisms. This is especially true of Pleurotus sp. (the Oysters), and from what I’ve heard, Hericium sp. (Lion’s Mane, etc), but I’m currently waiting on some Pholiota adiposa (Chestnut) to fruit that seemed to do well in pasteurized HWFP.
Give it a try, it’s a lot cheaper in terms of dollar cost, energy use, and time than wet-sterilizing in a small Pressure Cooker–but it’s best for expanding from spawn into more spawn or for bulking. You won’t get the same sized flushes as with something like grain or Master’s Mix, but you can easily whip up a lot more substrate–so it all comes out in the wash. I just retired 6 spent bags of P. ostreatus and they all seemed to do pretty well, and fruited more than once.
Thanks for the recommendation, I just finished watching it–and yeah that speaks volumes (quite literally, haha!). I love how they started off the episode with a very fluent mixture of non-English and a few English phrases.
I should really go back and revisit TNG! I remember watching it as a kid, but now that I have a few decades under my belt, I’ve gone back and watched a few episodes: and it really is packed with amazing philosophy and social commentary.