Submersible Heater

right...right...i've got lots of submersible heaters, and I do put them horizontal right down at the bottom of the tank...


but this one has WATER in it!! aren't they supposed to be air-tight???
 
Originally posted by SBee
[B......but this one has WATER in it!! aren't they supposed to be air-tight??? [/B]
I have yet to see one that's supposed to have water inside it.... :eek:
 
This has happened to me all the time. I have replaced my heaters at least every 6-12 months because of the condensation inside. (One time I bought a brand new "submersible" heater and found condensation in it THE NEXT DAY.) If you continue using it when you see condensation in there, the ceramic core begins to turn brown and marks from electrical arcing can appear on the inside of the heater glass. NOT a safe situation. Many "submersible" heaters have a water line near the temp adjustment knob. Tired of buying new heaters so often for my three tanks, I began just immersing them to the water line, so only glass is below water level. Have not had problems yet.
 
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