Mike just beacuse they are using them doesn't make them useful or required...they are a human mental thing...my fish are safe...a false sense of security. The Japanese are no better than us when it comes to bio-security
Obivously I haven't worked any Japanese shows but I have work many Orlando shows where they are never used and several MAKC and Koi America shows and I can tell you they are a joke...again, a false sense of security for the hobbyist showing fish.
Work a show and you'll understand
G