Shasta_man
Contributor
No time to review all the responses but I can unequivocally say "swimmer's ear" medicine as well as a drying agent for your ears. Despite experience previously I foolishly forgot to bring the swimmers ear and I as well as others started having some equalization issues in our ears after day 3 on our recent trip. The boat had medicine and we made all of the rest of the dives. Definitely bring it because it can be game over even though you feel fine otherwise.