How long does it take for the adhesive thermometer to show the correct temperature?
When the adhesive thermometer (JBL Aquarium Thermometer Digital) is first attached to the aquarium glass, it reacts with a slight delay. Float glass transmits up to approx. 85% of the heat. For this reason, the thermometer needs a few minutes after its application to adjust to the temperature. Even after a significant water change, the fluctuations are displayed with a slight time delay, but remain within the available scale.