Redundant air with SM configuration

[Bent Benny]

OP, you need to take an actual sidemount class with an actual sidemount instructor, not one of those self-certifying PADI types.

I had assumed you were just diving sidemount gear in what's essentially single tank diving but with a "really big pony," something I disagree with but accept that some people do this, but it seems like you're confused with the entire concept of sidemount diving at a very basic level.

Even a single day of instruction will significantly help you out and get you set on the right path. This isn't a judgement, you dive how you want to dive, but you'll be significantly more successful with some actual instruction.

I plan to. I actually plan on taking many more classes but right now my job as a commercial fisherman doesn't allow me to schedule anything. It took me years to find time to do a 1 on 1 OW course. In January I will be starting a new career though which has a 2 weeks on 2 weeks off schedule. I'm making this move so that I can have time to progress as a diver as I want to do it all as far as diving is concerned and I know that isn't possi le in my current line of work.

Thanks for the advice.

 

[Chilly_Diver]

I am diving side mount doubles, usually around 45-65fsw, but sometimes deeper. What is an acceptable amount of redundant air to carry, if any? I have a 3cf spare air that I shouldn't have bought but I didn't know better when I got it. I also have a 19cf pony bottle.

Part of me thinks no redundant air is necessary because I usually don't use all of my gas anyway, but I would like to have my rig set up so that it is ready for the longest and deepest dives I am making.

I know spare air gets alot of hate (for good reason) but I thought in my situation it might be acceptable as it is unlikely that I will bleed both tanks dry before starting my ascent, even in a worse case scenario. Maybe I am not taking something into consideration though so I would like some input.

Thanks for reading and responding.

A quick question, are you solo certified? These concerns should have been covered in the course in detail.