Best small heater?

[suspiciouspigman]

What’s the best heater to put in the third chamber of a Fluval Evo 13.5 with a VIVOSUN 210GPH return pump? I’ve been looking for good heaters but they all seem too big, so any recommendations?

 

[blaxsun]

Fluval does make a small one for the Evo 13.5. The smallest M-series doesn't fit?

 

[suspiciouspigman]

I didn’t see that one, it looks like it fits perfectly, thanks for telling me about it!