it could be co2 but then it could you just being a little nervous and hyperventilating
john
Quote: (Originally Posted by
scubasteve67)

Just an innocent question, I had a quick 15 minute go on a Submatix unit and found myself breathing like a race horse having run a derby almost hyperventelating. Is that normal for a first time go on a rebreather?.
I found i missed the reassuring sound of being on open circuit and the rush of air when i breathed in.
Just interested in thoughts really i was a little light on the quick dive which probably did not help the situation