Thank you guys for the fast responses. I already have a temp gun so I will probably end up using those for my ball also. I also have a digital thermometer with probe, so I might just use that but will see. I'm not sure what age or size of ball I'm getting yet but I'm getting it from a breeder so I don't think I will have to worry about mites. And Argentra when you said "The t-stat probe then goes directly on the UTH under the tub." Do you mean the probe that comes with the thermostat? And you place it directly in between the heat pad and the tub?

Thanks
Alex