Would a 75 watt heater heat a 20 gallon tank?

[Ron]

Would a 75 watt heater maintain a 20 gallon tank at 78 degrees? I would only need to use it for a bit because my heater broke when I was washing the algae off of it and my LFS is closed today. Thanks so much!!

 

[Nina7777]

for short term it will be ok. For long term it would be a no. General rule is 5 watts per gallon so you really should have nothing less than 100 watt. But for one day it is fine.

 

[The-Wolf]

yes that will do fine.
I have a 50wt in a 13 gal, heats up to 82 (if i let it )

 

[Daveo]

You need at least 100 wt in the tank! 8)


Daveo

 

[impur]

Will be fine unless the area the tank is in gets unbelievable cold. A 100 watt heater costs about the same though, might just spring for the 100 watter.

 

[Tropjunky]

yes it'll be good but it won't last long but u should buy 2 heaters half the size u need because if one of them overheates the ur not gonna get boild fish as fast and if one breaks then u got anouther to take the strain for a while