What if any are the restrictions on Sorb fills and O2 fills during the 7 day trip ?
There are no restrictions on sofnolime or oxygen. A proficient CCR diver needs 1 tank fill a day and has to change the Sorb according to the safety rules, usually after 4 – 6 hours, depending on profiles, scrubber canister size etc. While safety is paramount, we ask not to waste the oxygen and sorbs. Especially with a tempstik used and an inspiration sized scrubber canister it would be unnecessary to change sofnolime after every 2 hour long dive, unless it was a very deep and long Trimix dive with the whole decompression done on the CCR.
