First 93 seems high, I prefer a 90 hot spot. Also, I have a Clown that every week or two just goes to town. Lays all over, checks everything out. No mites checked the temps, all was good. Also had a Silverstreak pin that was similar. I have six identical tanks. I really never see the others. But there has been one or two that have been very active. I also have all my tanks in the main room of my house (in other words I pretty much see them all the time). Yes, I've noticed some balls are more active then others. Hope this helps.