Magnesium oxide

[ddjd]

I've been experimenting with magnesium oxide because of it was rumored to be Peat-friendly. However, two quotes have surfaced that make me question that (thanks to Mittir for pointing this out):


(source)


(source)

So, is the rumored recommendation of magnesium oxide a mistake, or has anyone heard of him suggesting it in a specific context?

Hey Dan do you have any idea what Magnesium hydroxide carbonate is??(MgCO3)

Is it the same as magnesium hydroxide needed for DIY magnesium carbonate??