To Olga and all: (a) I use my GOOD thermometer to test the calibration of the cheapies. Then, I leave the cheapies in the tanks. I would rather buy plants than thermometers. :-D (b) The J is for Jean, and I am a guy with a French first name, Norwegian last. (c) Since we have passed the Winter Solstice, I think I will concentrate on SPRING, and try to ignore winter. (Yes, I know, lots of luck!! :-( ) Happy New Year all!