Now that I have it, I don't see any indication on the bottle that it is pharmaceutical grade, and there is a warning that it is not for internal use. When I read around online for what boric acid to buy, the Humco brand was suggested. The Amazon product page has seemingly generic descriptions and I don't want to make things worse down there.
Does anyone have experience with this brand of boric acid? I need to start treating it ASAP and just realized this. Thanks in advance.
EDIT- Question answered! Thank you all for your help!