Chris80
Registered
I believe it really depends on how well your breathing is aswell as your bouyancy. I have spent most of my time diving the great lakes/tobermoray where temps are as low as the 40's on average. Using dry suits for the most part or thick wet suits and most of my fellow divers use AL 80's with no problem even on wrecks such as the Arabia (temp 42 - 48 avg. Depth 113 to 117) and the Keystorm (temp. 50's and 60's avg. Depth 115 to 117 deepest) I usually bring a 20Cu.Ft. pony bottle although I have never had to use it. My average time is about 15 to 25 mins for either of these wrecks, although to be fair the Keystorm is on a nice slope from I believe 25ft to 117ft so your not at the deepest for that long. Either way if you can manage your air well anything is possible, just remember expect the best but plan for the worst!
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