not to be a party pooper, but the grounding effect this idea is based on needs to be in the earth, not a plastic container on a table.
Discussion
I think it will work then if left too long it could possibly make the growth worse via too high an EH and/or eventually copper toxicity. Carbon is a battery after all whether its in an insulated pot or not though, but when grounded it is like a massive battery not a tiny AA or something.
