Dang! Y'all really do know your stuff! I was about to ask about bark harboring fungus gnats but
@lauriebasler beat me to it. And then I see there's something called 'chicken grit' and I'm a thinking 'What the what?' And whoa! It's sold in 50 lb bags (that's the weight of a small child!)
So thank you all for the education.
@synef - The only thing I will add is we know not where you live or where inside your house you will be placing your houseplants, and also what kindsa plants you have. These things might make a small difference, especially in the future.
@WillC - Do you ever use coir instead of peat moss? Or maybe I should just ask if you have an opinion about coir.