Question# 1- The size of the heat tape is mostly optional. 12" heat tape is very wide and probably is better for a very large animal but is mostly used as a back heat option in rack systems.
# 2- The minute fluctuations are normal in heat tapes. Whats more important is to double check the taping and try to not completely cover the probe. Foil tape is your better choice. IR gun is best for gauging temps.
# 3- Welcome back to reptile keeping.![]()