Lime/Calcium buildup

[gard]

I was just given an old 20 gallon aquarium and it has a bad Lime/Calcium buildup on the glass. None of the fish stores sell any fish safe cleaner, so I am wondering what works best to remove this buildup?

 

[rich311k]

white vinegar and salt make a paste and scrub away.

 

[gard]

This will not scratch the glass?

 

[rich311k]

No I have done it several times.

 

[Wizzard~Of~Ozz]

straight razor blade will get rid of most of it.

 

[Lonewolfblue]

I just used white vinegar and worked just fine on the 55G I got from my friend. Had the same thing. Straight white vinegar on a papertowel. Just get the small 20 oz bottle. I didn't even use a half a bottle, but did use lots of papertowels.

 

[gard]

Thanks, I will try the vinegar tonight.