The dive was done on air for 3/4 of the dive, and then the last 1/4 was done on 32% nitrox for preparations to surface. I really didn't start to feel very cold till the second night. The Reefnet sensus Ultra's I had to log the dive showed the temp to be between 88 and 87 degrees for most of the dive. Both also logged a drop in temp the second night down to 84 degrees. For thermal protection I was in an Mares Isotherm Semi-Dry.
How many tanks? How did you change them?