How many watts?

[Stradius011]

How many watts should the heater be for a 29 gallon aquarium?

 

[atmmachine816]

150w, 5 wats per gallon

atm

 

[Stradius011]

Okay.

 

[atmmachine816]

Best to get two 75w heaters so if one breaks the other one will pick up the slack and your tank won't freeze.

atm

 

[Isabella]

I have one 150W heater in my 30 gallon tank, but ATM is right - it is safer to have 2 x 75W heaters. This way, in case one of them breaks, you still have the other one working, which will give you enough time to get a new heater in place of the broken one.