[SporaScrub]

I just had my yearly maintenance done on my Mares Sten 150 yesterday and I wondered what would be the approriate amount of bars or psi's I would need to shoot in deep water?

The dive shop set it at 300psi and I told them to take it up to 400.
I would like to be able to make decent (10-12') shots on fast fish like AJ's, black groupers and mutton snappers at or around 70-80'

Thanks in advance for any help or opinions!