Hydreliox is an exotic breathing gas mixture of helium, oxygen and hydrogen.
It is used primarily for research and scientific deep diving, usually below 130 metres (430 ft).
Hydreliox has been tested to depths in excess of 700 metres (2,300 ft).
It is with this mixture that Sub Commander's expedition travels to new depths...
WARNING!
Although using Hydreliox improves the symptoms seen in High Pressure Nervous Syndrome (HPNS), a side effect of extreme depths, test subjects have shown that hydrogen narcosis is still possible below 500 meters (1,600 ft)
