temperature problems

Someone please help im worried about my new betta. The pet shop told me I can add him in one day after setting up the tank. He’s been in the tank around 36 hours now and was doing fine however i noticed the tank temperature was slightly out of range at 84°F so i have now lowered it to 80°F. I...

I need some opinions on what to do regarding my aquarium heater. I have a 3.5 gallon tank and the Aqueon 10W mini heater. My thermometer (which I’m not sure I fully trust, but anyway) says that when I leave the heater plugged in the water gets up to about 83 degrees Fahrenheit. It stays...