betta heater

Hi - I have a ten gallon tank filled to 9 gallon with one betta in I have a heater that I set to 26.5 celsius and a Dennerle nano thermometer that did match that temperature. A month on and I found that I was waking up to find the Dennerle reading 24 degrees celsius. My betta was breathing...

Hi there i have a betta complete with a tank , heater , thermostat and a air filter now the question is as above is it ok to turn off the heater at night while i sleep and turn it back on in the morning ? using my head i can only imagine if it was in the wild the tempter of water will drop at...