8 gallon heater suggestions

[Ascho18]

Hi everyone,
Does anyone have any suggestions for an 8 gallon/30 litre heater.

[balt]

I'm thinking about this one for my 10 gallon tank. I like it because it can be placed out of site under the gravel.

Hydor 15W (http://www.bigalspets.com/mini-heater-15-w.html?utm_source=Google+Products&utm_campaign=Google+Products+Datafeed&utm_medium=Comparison+Shopping&gclid=CLXW3Y7Yv7ICFegWMgodKB0AjA)

[Ascho18]

Just after i posted thjis we went to the LFS and saw this exact model for $25.
Thx but i think my dad is buying one from the uk as he works there. I think itll probably be an eheim 50W heater.