If you run low on air early, signal your guide immediately and show them your remaining air pressure. Your guide will help you end the dive and make a controlled ascent. A safety stop will be made when conditions and your remaining air allow.
If a second guide is available, the rest of the group can continue the dive with them. You do not need to keep diving just to stay with the group.
If you regularly use air faster than expected, let us know before your next dive. We can adjust the dive plan and discuss suitable equipment options, including the double tanks we provide where appropriate for your training and experience.