Comments about Apeks Seaquest Apeks XTX Tungsten Regulator:
I also own an Apeks "Status" which breaths the same. Not sure if I need my first stage to tell me everything is OK or not but it does not water mark from salt water as the tungsten version does even when rinsed well. Polishing it with "flitz" does take off the stains and actually stops it from staining again for awhile. Flitz must leave a protective coating on it.
Comments about Apeks Seaquest Apeks XTX Tungsten Regulator:
This is by far the best regulator I have ever owned in 20 years. I got the DIN version with the Apeks DIN to YOKE connector which simplifies my life when diving in Europe and make no noticable difference than having a YOKE. The deeper you go the better it breathes. I have only had it on 20+ dives but it is by far the best performing of the lot. I have the swivel joint which works great. The adjustable resistance and the changeable exhausts are great for photography. If you are going to spend money on gear this plus the Apeks XTX 50 octo is a great combination of quality and price.