Help! how big of heater should i have

[malibu599]

I have a 46 gallon bowfront saltwater tank. How big of heater should it have? Would running 2 be better?
Thanks for any info you can give me

 

[nss11110]

i would use 2 100watt heaters. that way neither one has to work too long and if theyre at opposites sides the tank is heated more evenly

 

[mr . salty]

Definatly TWO heaters.But this is because if one goes bad(sticks on) it wont have enough power to overheat your tank too quickly.This gives you time to catch this malfunction before your tank is fried...