Hydrated Lime?

TwistedTiger

In Memoriam
I found a ten pound bag of hydrated lime from Batesville Marble at the local Ace Hardware. It says Batesville Marble Hydrated Lime but doesn't list ingredients. Their website has zero information that I could find. It has a list of uses on the back and it lists pickling so it is food grade. Is there any risk of it containing something that I don't want in the tank even though it is food grade?
 
Hydrated lime can be different things, but most likely is calcium hydroxide, and assuming it is food grade, it should be fine to use.
 
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