[Asteroid]

Full disclosure, I got rid of all my heaters a few years ago. So far I haven't noticed any real differences in fish or plants. My temps throughout the year vary between 68 and 75. Other than the obvious warm water fish are there plants and/ or other fish that need it warmer? A benefit of the cooler water I believe is also slower algae growth.

I guess the range of temps in ones home would be a deciding factor if one can go heater-less.