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jlaudiofreak
03/16/2011, 10:35 PM
I just picked up a 40 gallon tank. The tank has a white stain look around the top half. I have soak the whole tank in 100% vinager and stain still there . I tried to scrap it with a razor blade and it took alittle bit off . Anyone have any Idea what this could be.

Reefers Digest
03/18/2011, 05:07 PM
Calcium (Lime) deposit.

I found scrubbing it with a diluted vinegar-water solution, then meticulously scraping it with a razor blade (bent the blade to make a slight convex shape) worked well. I've heard horror stories about deposits that just wouldn't come off, no matter which solution was attempted.

Good Luck