walke121
Contributor
I use a 40 cf pony bottle mounted to my 119's or my 130's (singles) when spearfishing. The only problem is I normally use 40% EAN in it to breathe off of during my safety stop. At the depths I usually spear in that puts my PO2 way too high. I usually don't dive with a buddy by my side per say, we usually go down in pairs but don't really stay together. The dives are anywhere from 60-180fsw. They are very quick, 5 min bottom time at most usually less than 2 min. I have a H-valve on all of my tanks though for some sort of redundancy.