Do I Need A Heater For My 30g Planted Tank?

[porsche714]

we have a heater but dont know if we should use it or not.

 

[~T~]

Depends what kinda fish/plants you want to keep in there.

 

[crazie.eddie]

It will also depends where you live. If you live in warm, tropical climates, then you won't need a heater, just maybe a chiller.