I have been diving Nitrox for several years but never 36%
Went with a friend on a dive charter and and although the dives were less than 80 ft they had everyone that dove Nitrox on 36%. I assumed more O2, less fatigue, no problem. (We analyzed tanks before the dives)
After the 2 dives I felt tired and sleepy. Went home and slept a few hours. When I talked to my partner, the same thing happened to him.
Went out again on the same charter and got Nitrox 36%. Same exact thing happened.
Got home at 1pm after a couple of 60-75ft dives and went straight to bed and slept until 5pm. They were both benign, non stressful drift dives. My dive partner had the same experience too.
This had not happened before.
When we go out again, we are going to request air or 32% to see what happens.