Best 50w submersable heater?

[psyche]

Hi all.

I am adding a lid to my 5g and so want a good 50w heater than can be fully submersed, and that is the smallest size possible.

I currently have a Marine land visitealth but when I submerse it fully it seems to stop working, although it works fine with the control end out of the water : / -- it is also fairly large.

Can anyone recommend another brand, especially a small sized one, which would allow me to have only the power cord extending out of the tank?

 

[Nolapete]

Unplug it, set the temp, put it where you want it in the tank submerged, then plug it back in. Sometimes the thermostat needs to reset. I have them in a bunch of tanks submerged and they work fine. I have noticed that if I move them or adjust the temp while they are plugged in that they sometimes stop working until I unplug/plug them.