I treat them like they would eat thru my shirt, and always go to the sink and rinse them very thoroughly. Just to satisfy my own curiosity, is this overkill? Would a gallon or so of water in a bucket be sufficient to dump and rinse in? Would a drop of one of them in the tank just kill everything? I'm not so lazy I can't walk 10 feet to the sink, but I like having some idea what chemicals I'm using and/or how toxic they are.