Probably no mercury.: Hello and thanks for using Healthtap. Modern fish tank heaters don't contain mercury or poisoning elements. Burning odor could be related to other elements such nickel, chrome and plastic. Hope you found the answer helpful. Greetings.
Answered 1/3/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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