Nitrox:
- Pacific Wilderness, San Pedro
- Hollywood Divers, Hollywood/LA
- Ocean Adventures, Venice Beach
- Eco Diver Center, Culver (I believe also has Nitrox.)
- Dive N Surf, Redondo Beach is installing a Nitrox system this year with the new building that is going up.
O2:
- Pacific Wilderness
- Hollywood Divers
- Ocean Adventures
Extras:
- I believe Hollywood divers is the only store that uses membrane so O2 clean not required (but recommended).
- Pacific Wilderness does Hydros in-house!
Both Pacific Wilderness and Hollywood Divers are my two favorite dive stores.
Pacific Wilderness has good pricing and if you know them, the price gets better. Hollywood divers has good pricing. I found Ocean Adventures to be expensive and don't use them anymore.
Some stores charge by the CF and some stores charge a "tech fill".
Just one thing about dive stores - If you only stop by on the weekends, you don't often see the owner/team who runs the place which makes it difficult to build a relationship.