On Feb 17, 12:21*pm, (L u) wrote:
Is it true that goldfish don't need a heater? I don't have one.

Lu

Well they can take low temps, but its not good to expose any fish to
extreme temp swings..........So its nice to have a heater that will
help keep tank temps up to a certain point so it does not drop as much
at night and make temp swings.Use a heater not so much to heatr the
water but to keep it from getting below a given point whichmakes for a
more stable environment for the fish.If its for a goldfish its not the
heater that I would be concerned with as much as I would be with good
filtration and gallonage of tank and 5 gal is going to become way to
small in short order.