Fluval Flex 15g Heater?

Hey everyone! I purchased a Fluval Flex 15g online yesterday, it should be here soon. The tank doesn’t come with a heater, and I was wondering which heater would be best for this tank? The tank measures 16” x 15” x 15”. I was looking at some of Fluval’s heaters I think they have a couple different options, but I didn’t know if one of them would be a good one to buy or if you all had better suggestions. The Fluval 50 watt heaters say they can heat up to 15 gallons, and my house stays very cold year round so I didn’t know if I needed a 100 watt heater or if a 50 watt would work. Any advice would be appreciated, thanks!!

 

50 should suffice!

 

I have been doing research for a betta tank too and I have found this one:


50 watts should work

 

any that's got an automatic shut off feature when exposed.

 

I agree with qldmick just make sure there is a thermometer built in so that u can tell the temp

 

yer I broke one once during a water change, got exposed, the glass cracked, burning smell, not good.