I just bought it yesturday. Most of the time during the day the house temp sits at around 79+, so I generally don't worry about that. During the nights though, the temp sinks to about 75, or like this morning, 74. This wasn't suppose to happenn though, I had installed the Tetra heater last night, this is how:
1)Unwrapped from box
2)Read the set up phamplet
3)Placed heater in tank sideways [=====]
4)Plugged the heater in
Shocked to find the tempreture this morning to be at a chilly 74 degrees, I decided that I would carefully touch the heater to see if it was actually -heating-. It's only nearly luke warm, maaaybe not even that...
Can anyone advise me on this matter? =( I'm really sad I let Riddle rest in such chilly water!