Stupid computer lost my message

Thanks for the links, Jamie - I was particularly interested in this link from the first one http://www.spyderrobotics.com/suppor...edocument.html regarding thermostats failing and not cutting out. Exactly the same thing happened to me many years ago with my tropical marine fish - I came back from holiday to find they had all been boiled ... poor things it must have been awful for them. Has this ever happened to any of you guys? I must admit it does worry me.