seppu

hello
2 points for high pressure booster.
first,sometimes the mixing goes wrong.everybody now this situation.afternoon-filling,next day morning-analyseing,upps bad mix.now a topoff with helium or oxygen is easy.ok,be careful with oxygen.
second,this is a private rule.every tank have a second stage.full 2x3 liter.are ok for 40 meter quarrydives.a full 02 tank better than nothing.
gruss sepp
i use the little devil mo22