Aquarium Heater Help

[maninahat]

Hello folks,

I got a brand new 50W superfish nano heater for my tank, and I have a quick question before I install it. The instructions are kind of vague; it says that the heater should be placed at the correct water level, as "clearly indicated" on the heater. I can't find any such indication on the heater.

How deep should the heater go into the tank? Should it be entirely below the water level? Or should it be sticking out of the surface? Anyone got the same heater?

 

[BigC]

Hi.
Does it not say Submersible......all the literature and adverts say so.
Regards
C

 

[maninahat]

Hi.
Does it not say Submersible......all the literature and adverts say so.
Regards
C

Thanks. So that means I keep the rubber portion (the it with the temperature control) above the water line, right?

EDIT: Also, the box describes it as "a submersible mini-heater". But it still contains a line in the instructions about there being a water level indication on the heater.