So my temp during the day is about 76. (the lights are of at night) When I wake up in the morning my temp is around 71, but in a short bit it goes back up to 76.
I don't own a heater - is this 5 degree difference hurting anything?
plant growth? fish?
(by the way, my fish seem to be living fine, i have had most of these fish for 2 years or so.)