Thermometers

[vanalisa]

I have a digital thermometer with probe on each of my 3 tanks. They register a reading within about 15 seconds. They cost about $4 each on ebay or Amazon. I’ve had no issues with them. The battery lasts about a year and a half and is replaceable.

Thanks
I am weird; I don't like Amazon or buying things online.
I saw one yesterday when I picked up the stick on kind. The key thing here for me is the registering in 15 seconds . Will get one!
Can't afford one for each tank...