Modest_Man;2002240; said:Acid. *Shrugs* They're hard water stains (basic) so you want to use an acid (which vinegar is) to neutralize it.
Here's what I'm getting rid of/have for sale.
http://www.monsterfishkeepers.com/forums/showthread.php?t=158261
ok
There's different types of vinegar, maybe one of them has a higher acidic rating than others?
I'll try it again though. thanks