Jager/Eheim Submersible (yet non-submersible?) heater

[perpacity]

So I received my Jager 50W "Submersible" heater today. This one to be exact: http://www.bigalsonline.com/catalog/product.xml?product_id=30601;category_id=1733

Thing is, it has a line that says "Do not immerse beyond water level"... What's the deal? I thought this thing was submersible.

 

[Mushroomman]

I noticed that too on my submersible Jägers, havnt figured out why it says that but it is submersible, at home and at work we have them underwater. Its fine.

 

[perpacity]

Thankyou very much