All of a sudden, something's rolling around inside my tank!

[Kublai]

I might just be imagining things, but the tank to which I referred when I started this post was my tank on my second dive yesterday. Thinking back to the dive, the sound of my breaths changed a bit in a head down attitude. My air was never interrupted, and I am not aware of ingesting any water-- but there was a slight 'gurgle' sound I noticed several times. I just dropped the tank off for an annual in the last hour-- it will be interesting to see if there was any condensation in the tank. (The tank that I had on dive 2 yesterday, which is the one that we suspect has the dip tube that fell out.)

Thank you all for the quick education on tanks and dip tubes!