I have an Eheim Jager 200W heater fully submerged in my DT. I really want to put it in my sump but it won't fit in a way that allows the water to be up to or over the water line mark on the heater (about an inch below the blue dial). I've seen pictures of folks who have their Eheim's in their sumps diagonally with the water below the heater's water line and they have been doing this MUCH longer than me! Is this OK to do? I don't want to start a fire