Is a heater needed

[dramaqueen]

I think their colors do brighten up in warmer water.

[MrVampire181]

for tanks larger than 2 gallons then yes.

[dramaqueen]

I don't have a heater in anything less than 2 gallons.

[MrVampire181]

That's because there is no heater for tanks smaller than 2 gallons, I wish they did, they have small filters but not heaters, if they did betta bowls would work.

[froglady]

Thats what I do Chicklet. summer gets very hot in our home, and the frozen water bottles work excellent. to keep the fish comfortable.

[dramaqueen]

I think we were discussing heaters. lol

[MrVampire181]

LOL, tropical fish!!! We don't want to chill our betta's butts off, or tail which ever way you want to look at it :P