Basically, it would be a very handy thermometer because the temperature display is out and is easy to read. However, the measured values are too inaccurate and totally untrustworthy. Who sensitive fish and therefore exactly needs values, it is absolutely ungeeignet.Mein old thermometer I wanted to replace as the display passed slowly, so I was able to compare the values un what I saw did not like me. Above all, I was surprised when the aquarium lighting was turned up that the water temperature lowered when DIGIFLEX (which is absolutely impossible).