I changed Luke's water around 10:30 am yesterday. The thermometer was have is the kind that stands up in the tank and has a rubber bottom. After I rinsed it it kind of fell over but it didn't break. I did have to check it for a break because it fell kind of hard on the counter (granite).
Our heater is the 25 watt programmable adjustable PetCo heater. We've had it for a little over two weeks and I keep it to where the temp stays arond 80-81 degrees.
Before we left to go to dinner last night, the temp was correct in his tank. I remember looking.
This morning I get up and feed him and notice that it's around 75 in his tank and the light on the heater isn't on. It's NEVER dropped below 80...ever. So I take the heater out thinking maybe I hit the knob on it when I was cleaning it yesterday or maybe it's broken and turn it up. The water doesn't feel
any colder. It feels the same. I turn the knob slightly warmer and put it back in and the light lights up. The heater seems fine.
Then I get nervous that the thermometer might have issues. What if when I turn it up it ends up getting to be like 86 or something in there??
What would be your plan of action? I should go buy another thermometer and see what it says, right?