General Heater Question
I have a quick question concerning aquarium heaters, I couldn't dig up any specific information concerning this issue. This is also my first aquarium, so I don't have any comparison.
I have a 50w All-Glass Aquarium heater (My tank is 10g), fully submersible, with a temperature dial on the top. I payed around 20 bucks for it, so it should be at least on the decent end as far as heaters go.
Being that it's the summer time, my tank water is sitting around 83 degrees according to my thermometer. The heater is set to 75 degrees. I've noticed that every 10-15 minutes or so, the indicator lamp in the heater turns on, stays on for about 15 seconds, and turns of again.
Being that the tank water is 83 degrees, why is the heater even turning on? Being that it stays on for a very short amount of time, and at a seemingly predictable interval, is this normal operation?