Weird white "smudges"

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joldfield

Aquarium Advice Apprentice
Joined
Mar 21, 2014
Messages
11
Hi all, thank you for always being so helpful while get used to this new tank.
I recently discovered white "smudge" looking marks on my glass. It cleaners off fine, but what could it be?
 
If you are using a vaperizor in the room for humidity that will do it. If you have a water softener and changed salt brands that could be it. If not it must be a flux in your water chemistry. Mine does this every time we get a lot of rain.
 
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