Originally Posted by Jrf456
I have a 5 gallon with 5 females in it with about 5 or 6 hiding spots. I have a filter, and I refresh the water 10% every 5 days, but I'm wondering do they need a heater? It has a light that stays on most of the day and the tank is right next to a window that fights the hot Florida sun..
So yeah, should I buy a heater?
First and quickly as I'll let others field this more... 10% every 5 day water changes is insufficient.
As for the heater.... I think it depends on what temperature, and equally important, how stable that temperature is in your tank. Assuming you have a thermometer (should if you don't), as long as your temp is around 76 to 80 and stable
at that temp, you should be good. But, if the temperature fluctuates at night, or cooler days by more than a couple degrees within
this 76 to 80 range, or if you can't maintain temp within this range, then you do need a heater to maintain an adequate temperature.
Just be careful if the tank is in direct sun... the sun can raise the temp too much and then when the sun goes down, the temp will drop too much in the tank. Again, it's a stable temp that is very important, too.