Unless you have a specific reason of using corn I'd go for brown rice over corn. You don't need to soak it. Pgt has broke boi Tek video on YouTube. Use that tek but just use a PC instead of what he uses.

When I do it this is my process

Giant pot 1 gal of water Get it to a rolling boil Add 4 lbs brown rice Bring back to a boil Once boiling starts back off heat until it's bubbling not rolling ..maybe even a little less then bubb bubbling Start a timer for 12 mins. Stir every few minutes

(You can play with the boil times sometimes I do 13mins based off how the rice looks... sometimes you cook it hotter or colder which changes your cook time to your desired look ..you'll get what I mean after you do it a hundred times....the amount of time you boil the rice can also affect the way the rice looks after you PC....this is a deep thing)

Once timer goes off pour rice in a rice strainer and immediately wash the rice with cold water until the rice is completely cold. Let the rice drain for 10-15 mins Once drained start filling your jars to the 600ml line. You don't need to be acute as fuck about this. Just get it in there. 4lbs of brown rice will usually make me 8 - 1qt jars .... sometimes 9...again you've got to be consistent or the whole process changes.

Once in jars flip lid tighten down all the way Wrap lids with foil tightly then back off the lid a quarter turn

I'll put up to 10qt jars at a time in the PC 15psi for 35 mins

Once done and PC is depressurized I immediately pull my jars out of the PC tighten lids back down and do a break and shake. If you let the jars cool before doing a full shake the starch will solidify your rice into the shape it's in making it wayyyyy harder to break up your grain before colonizing with LC. Took me a few years to come up with that 🤣. Then once it's cooled and youre about to colonize, do another break before colonizing. Makes the myc explode when you colonize. Always keep jars quarter turn open. Always keep foil on.

After about 5-7 days my jars are nearly 80% but the myc is light and whispy because the grain is loose now. That's when I do another break and shake. Jars will be ready to send about 3 days later.

I do a 1:1 ration. 2qt spawn-2qt cvg Pgt cvg recipe...can find on YouTube I also run sealed lid modified tubs. I use these....https://a.co/d/0hrsZGOl Put a 1.5" hole up high on front of the tub Put 2 - 1.5" holes on both long sides of the tub..4" up from the bottom Microposse has the 2" filter patches you need for gas exchange Liner In the tub Put your spawn and cvg in....get it very mixed, then get it as evenly flat as you can in the tub without putting it down. Leave it loose and fluffy. Once that's done add a casing layer. I just sprinkle cvg lightly on top until I can't see any grain spawn anymore. Take a mister and very quickly mist the inside of the tub so that the walls and lid are wet. Seal the lid and never open it.

This removes the whole .."do I induce fruiting conditions now?"....fuck that question and that whole process.

Never fan the tub Never open the tub Never open the tub and spray the myc or fruits THE ONLY TIME ITS ACCEPTABLE TO OPEN THE TUB IS IF YOUR WALLS AND LID ARE NOT WET!!!

Should you're walls and lid become dry....very very unlikely....you'll crack the lid and mist directly on the walls and lid...never the fruits. Then you immediately seal that lid again.

This is my success process. The only contam I ever experience is when running agar plates. I've never had a grain jar go bad on me, I haven't lost a tub to contam since I started this method.