If you need to use the yellow second stage, put it on a black long hose. Get a new neutrally coloured second stage with a black short hose and necklace that.
Or... buy good primary 2nd stages so both you and your buddy have good performance delivery of gas when you need it the most. (Stressed divers breathe more, and need good performance from their regs)
Or... buy good primary 2nd stages so both you and your buddy have good performance delivery of gas when you need it the most. (Stressed divers breathe more, and need good performance from their regs)