Stupid question

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The boring name

Aquarium Advice FINatic
Joined
Jan 5, 2013
Messages
826
Location
charlotte NC
Hey guys well I just noticed on my 55 gal tank when my heater starts up it has a blue spark on the inside. Is this normal. It's a tetra ht 55 or somthing like that. Thanks
 
Ok just making sure because the red light will turn on and ill see a blue spark light up behind it. Ik the heater is "electric" heater meaning it heats with electricity. Dad and I were just a bit parinoid
 
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