How many or what wattage of heaters do I need for a 300gallon?

[michael]

It is 96" long and the guy at the store said to have a 300 watt at each end to be able to get 300 gallons above 80 degrees! Accurate or do I need more??

 

[billylee]

Dude, you need 3-5 watts/gallon.
You are lookin at least 900 watts.

 

[rallysman]

In my 300 all summer I got away with no heaters at all, now that winter is here, im experimenting with heaters in the sump...so far 300 watts in the sump is working very well...

Hopefully the streak continues.

 

[DeLgAdO]

repair told me that its not very effective, he had a different in temp between his tank and the sump.

you come across the same thing

 

[Mourinho18]

I've got a 350 gallon tank and i run two heaters. 1, 300 watt heater and another 250 watt heater and they're both relatively close to each other. Temperature on the other side of the tank stays between 76-80.

 

[rallysman]

repair told me that its not very effective, he had a different in temp between his tank and the sump.

you come across the same thing

AS long as the part where the fish live is good....im good! lol

 

[cockroach]

i have a 268gal and i use 2 450watt heaters on an external thermostat in my sump, working like a charm for me. i would agree with billylee. rather be safe and with this amount of watts there are no fluctuations in temp

 

[papillon]

that would do. 2 x 300watt heater at both end of the tank

 

[peanut]

that would do. 2 x 300watt heater at both end of the tank

i agree

 

[twk1]

For my 370 i use 1- 250 watt heater that is placed in my sump, works great!