heater?

[fish r friends]

i have a new 28 gallon and i was wondering how many watts my heater should be, also i dont want to be wrong but i have a whole bunch of fish and invertabrates so wat would be the best heater (watt size) for all of them?
THANX!

 

[caseysimp7]

i guess 75 to 100watt would be good

 

[caseysimp7]

but not sure

 

[fish2]

i would say 50-75 watt