magimango;4535517; said:I think surviving and thriving are two very different things. The oscars my survive without a heater, but doubt they'd thrive without a heater. My two cents.
On a slightly related point, the Mrs. keeps a heater running on her fancy goldfish tank to cope with the fluctuations in temperature, and I have to say they seem a damn sight healthier and impressive since its been running.
Yeah, because temperatures never fluctuate in the wild or anything...
