calcium stain

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Cleaning an Aquarium

Winona Morris @nonersays (3344) • United States 4 Feb 12

I just got an older 29 gal aquarium from my brother. I've kept aquariums in the past, but never taken an older one. This one has white stains on the glass of the aquarium and the hood and such. I've been told they are hard...

hard water stain

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