Thanks for the question, if you look at my avatar you will notice I don't have a dive count listed. Dive counts don't make you a better diver.May I ask, what is the point of 20 minute dive, floating for 3 min. And back down? Is it just to get your dive count up?
That being said, I was wanting to practice ascents and decents. It was needed, because on my first ascent I rocketed up, I manged to slow down before I surfaced. I spent the surface interval to collect my thoughts and figure out what I did wrong. Also with this being my first solo dive, I just wanted to be careful. BTW my second ascent went perfectly.