regulator issue

So I have an apeks xtx50 for my primary I have a swivel between the 2nd stage air hose and my reg. The female part of the swivel mounts to the xtx50 and before I can feel resistance, it bottoms out (the end of the female meets the base of the male threads of the xtx50 I’ve had the o-ring...

Hey Everyone, Need some advice on my Cressi T10 first stage. I recently bought it and after using it for one dive I am noticing black marks all over the first stage. I took extreme care in transporting and washing it with fresh water after every dive so I am not sure what is causing this. Any...