Had some good advice from Mark Cortnoy which I use and it works. People like pots at eye level. I would move away from the tables and build a couple of standing shelves. sold most of my pots from these shelves.
That turquoise glaze is tricky. If you get it on thin, it goes brown. I dip all my mugs in a bucket-fully immerse for 5 seconds. There is one material that flies around-soda ash? maybe? I am not in the studio at the moment.
The thickness of the application seems to be crucial with this glaze.
Check my gallery for some mugs and a teapot using a turqoise glaze. Using paper resist for the dots, then the glaze flashes on the bare spots.
The BC causes internal hemorrhaging and bleeding.... that is what kills the mice/rats. You'd have to get them to eat enough of it. The blood loss makes them thirsty.... which is the theory that they will go outside to find water and die there... instead of in the walls of your house.
The LD50 (the amount that kills 50% of the test subjects) for rats and mice is about 500 milligrams per kilogram of weight. (0.500 grams) The average mouse weighs about 50 grams....or .05 kilos. So they need to eat only a tiny amount........ a little over 2 and a half/100's of a gram.
You'd have to mix it with something they like to eat and hope the BC doesn't add a flavor they don't like enough to avoid it.
Personally...... I'd just got by a trap or some RidEx. Easier.
BTW... assuming the same LD50 is valid for humans...... for an LD50 dose to a human of about 175 pounds...... or 79.5 kilos....... you'd have to ingest about 40 grams of barium carbonate to have a 50% chance of living thru it to tell the tale.