you sir have a plethora of handy dandy info
question you think WBS is the best route for a monotub ifi cant get HPoo due to the farms around here not being freindly about it during certain times of the year
Well, as I said, I don't think much of Wild bird seed at all. You can use corn, rye, straw, worm castings, dog food, cat food, leaf mulch, millet (admittedly close to bird seed), rice and a host of other substrates or spawn materials so why limit yourself to bird seed? Bird seed has a mixture of different grains in it and often gets slimy, it is difficult to cook twice (once to introduce water and once for sterilization) and tends to clump. PF tec stuff doesn't concern itself with clumping because the PF folks are content to wait eons for their little pucks to colonize but why do that when you can get almost any size granular substrate to colonize in exactly the same time? I can get a gallon jar to colonize as quickly as I can get a quart jar to, (well, almost). You can wait 3 weeks for that puck or you can wait 6 days for a quart jar, but only if you have discreet grains and can shake them.
to tell you the truth, I really don't know what a monotub is composed of. The nature of the mushroom we are working with is that it is both a primary and secondary decomposer. That is why it will grow on straw or grain and also on partialy decomposed straw that comes from a horses rear end - or the even more decomposed constitutants of compost. It really is your choice. If that is true, then by all means pick something that is as easy as possible to work with, or as cheap as possible, or as available as possible. If you are lookking for something quick, don't bother with spawning at all as each of the grains
I've mentioned usaully have far more nutrients than the mushroom can use up before all the available moisture is gone. Your fruit will be smaller but few care about that.