hop2jr

Just bought a Marina Digital themometer and it is saying that my tank is 5 degrees diffrent than the strip thermometer that I have on the front of the tank. Both are in the same place on tank thinking the digital one is off but how can test it? Does anyone have the same problem?

Tavel

you can use a kitchen thermometer or even a medical thermometer.

If you don't have either, you can do a very simple test...assuming it goes that low. Make an ice bath out of crushed ice and water (half and half) and put the thermometer in there. It should read 32F or 0C, always.