regulator cleaning

So, my first topic. I recently purchased a new oxygen clean regulator for using with a stage. Probably will be using it with 50% oxygen. what will happen if I use this regulator with a tank filled with 21%? or 32%? Does that void the cleaning of my regulator and i should clean it again? I...

Howdy Divers, this makes my first post on the board. Been browsing and have a feeling I'll probably spend lots of my time on here! Alas, I need help identifying this first stage. I believe it is an Aqualung Titan of some sort, but I can't find info on definitive model or generation. I got it...

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...

Hi all, new divers who just invested in x2 Apeks XL4+ kits for me and my wife. After reading the manual it specifically says about pressurised soaking the regs for around an hour, which I intend to do. TLDR What kit should I get to pressure soak the regs. I was intending to get a "spare air"...

I have a question that's been troubling me regarding rinsing off unsealed regulators. Common practice is to place the dust cap firmly over the opening and rinse. however, I recently got an Apeks (unsealed) 1st stage and I have been pulling up threaded stating that you you need to clean the salt...