can you wear silicone ear tunnels when scuba diving?
going on a diving course next month (in tank with sharks, not open water) and in the FAQ thing at the end of my forms it states "no Jewelry" which i can understand as they can fall off, and get caught etc. But do silicone tunnels that are really tight in my ear count? as having 24mm ears i'm worried if i take them out they will close up a size or two within an hour, which i really don't want.