Thanks for the information and the concerns. I was not aware of warm water and proportional mineral content, but the sink i use for my toads is rarely used for washing, brushing teeth, etc as i have two sinks next to each other and nobody else in the family wants to use that sink now that i've had toads in it.. i brush the sink down (not with soap) before filling with water. The two are in separate containers and are only next to each other when i put them in the sink under my visual supervision.

I've handled both toads numerous occasions before and neither experienced shock, or at least no reaction like what i saw today. I know toads aren't meant to be handled and i try to coax them into my hand and lifting them up rather than picking them up. The little one usually hops right on but the big one tends to run. I've had both for almost 5 months now so it was weird seeing this for the first time. It seems fine now and I will look into getting a house structure of some kind for them to hide under.

thanks for all your help, glad to hear it wasn't life threatening.