Temperature Probe for HurricaneX

If any surface rust develops after a long time, it usually means that a fingerprint or two was left on the surface.  This does not penetrate the probe (hence it's name - surface rust) and the negligible amount of rust does not "float off" into the water like lesser grade steels - it is not harmful to your aquarium.  You can clean it off by using fine grade steel wool and rubbing alcohol and make it shiny like new.