I've been reading up on these chemicals. Not only are they supposed to release oxygen slowly in the presence of moisture, but they aren't supposed to be harmful to non-pathogenic microorganisms (their use thus far has been to speed up soil microorganisms' ability to break down petro-carbons and other soil pollutants, i.e. "Bioremediation".)

Basically, I'm wanting to run a small experiment on what these chemicals can do for garden soil and what they can do for a compost pile.

Anyone know of any (fairly inexpensive,) sources for Mg2O2 and Ca2o2?