Aqualung i550...Need Help

[Roxs802]

ok

 

[Centrals]

I have never known any computer will allow 3 "preset" gases for three separated dives.
Those allowed 3 "preset" gases are for the same dive ie tec dive in deco gas switching. And the deco gases have to come from different tanks. Your i550(console) is only connected to your back gas so it will not know anything about your deco gas pressure. Therefore it suggests you to look at the spg which is connected to the deco tank!!

My suggestion: You only need to input one gas on every dive.