lol..I tend to get the knowledgeable reps every time ;) I tried plugging them all in to a strip, and the strip to the Zilla Tstat, and with the Zilla set at 89 I had one tank (with probe) at 89/90 and the rest ranged from 85-105. I tried a new Zilla, a new power strip and let them all cool and restarted at the same cooled temp..made no difference. The only way to get them to regulate properly was individual stats. I'm going to get the Helix and hope that it does a better job. I'm going to be upset if it doesn't, but not completely surprised. :please: