We offer 32% or lower fills.

Lois Ann Dive Charters is proud to be the only San Diego boat with the ability to fill nitrox tanks on-board. The installation of a Nitrox Membrane System by Undersea Breathing Systems, Inc. was the first of it's type on any California Dive Boat. This installation was engineered personally by Charles Townsend, President of Compressed Air Specialties, Inc., Anaheim, CA.

We do have the capability to fill and refill our Nitrox tanks on the Lois Ann during your trip, but it is necessary for the crew to have your Nitrox requests a few days before your trip date.  This allows us to have your tanks ready to go.  We do store 32% to speed up the process, mixes other than 32% to fill your personal tank require the system to be hot, something that we cannot accomplish on the first trip of the day on a run to wreck alley.  There simply is not enough time.  If you have Nitrox needs or questions, please contact us in advance so that we can work to satisfy your requirements. We are able to make a limited amount of nitrox on a trip, but our system and supply has limits.

The main advantage to the DNAx system is that pure oxygen is never present, eliminating the requirement for O2 cleaned cylinders. While our nitrox is filtered twice to remove hydrocarbons it should not be considered to be "O2 Clean". We use Grade E Air to supply the membrane which separates nitrogen and oxygen in the air, dumps some of the nitrogen as a waste gas, and then recompresses the remaining oxygen-rich gas (nitrox) into a scuba cylinder. We analyze the contents in your presence so you are assured it was done properly. Nitrox divers on our charters have the option of bringing their own tanks or using the steel 80's supplied on the boat. We also have steel 90's available.

Nitrox Rates click here