water lines
water lines
The most recently available Jagers have no water lines and indicate that they are fully submersible. They are identical to the Jagers that have been sitting on your dealer's shelf for a year or two, with the submerge limit line. I think this line was put there for some technical legalistic reason. In any case, I have semi-antique Jagers from back in the 80s that proclaimed that they were fully submersible, and they were, unless you wacked them too hard, let them run dry, or did something equally foolish. I no longer use my old Jagers, but I recently lent two for temporary use in isolation tanks. They worked perfectly, after sitting in a box in my garage for years
No heater is perfect or infallible, so I use multiples, set to about 85F, attached to a Ranco set at a lower temp. I check the Ranco controllers regularly, using lab grade thermometers. Most commercial aquarium heaters are junk, designed to impress the credulous. Jagers are about the best of the lot, in my experience.
It all depends on how much you have invested, and what your risk tolerance is.