Well...what to do after a beer and Thai box meal?
Take a Zilt stick and bit of 15mm copper. That's my electrodes sorted. Lad's meter:
Push into dwarf bean pot:
0.8VDC:
Same again with the runner pot, link the two "earth batteries" together and we get 1.6VDC:
Wonder if it's enough of a deterrent if I put two copper strips around the pot? That's for another night/month/year as I work at a.....snails pace!