I have a 2-2.5 gal tank. They are very hard to heat simply because small heaters either a) don't work or b) work wayyy too well.
I brought my fish home from the dorm for the weekend and it looked to be a little chilly in his tank this morning. I plugged in his heater, which is 10w, I believe. In my colder dorm it has worked well so far. However, I got home 45 minutes ago after being gone almost all day to 90F water and a fish who was sleeping in a strange position inside his little house-thing. I grabbed a couple of ice cubes and settled to wait and see if the water would cool, unplugging his heater.
I can get away without a heater during the day, the light on the tank will warm it quite enough. However, at night at the cool dorm with winter air coming in, the temperature will drop too much. What do I do?
- Leave the heater plugged in anyway. Betta can handle 90F water, right? Discuss.
- Don't turn the light on, don't use a heater, let the water naturally change temps.
- Bury the heater under rocks, so that the rocks act as more of a buffer to the water.
- Plug the heater in only at night (or set a timer), leave the light on during the day.
As far as Finnick goes, I think he's fine. More half-asleep and frustrated from being woken by the lighting than anything.