> What you mean is: you need more air in you buoyancy compensator (BC) to maintain neutral buoyancy (= keep your volume constant) as you go deeper. I did indee

> What you mean is: you need more air in you buoyancy compensator (BC) to maintain neutral buoyancy (= keep your volume constant) as you go deeper. I did indeed neglect to explain what needs to happen. Thank you for clarifying. Let's all hope to enjoy many more dives :)