My brother gave me his large aquarium (18" H X 36" W X 12" D) and I hope to turn it into a terrarium. The problem is that the glass is stained inside and I can't seem to clean it.
It was covered in that crust you get when you leave an aquarium un-tended and just let all the water evaporate out (don't ask me how I know about that). Lots of elbow grease and baking soda has removed the crust, but there is still some kind of stain making a ring all the way around about half way up (inside). I even tried Lime Away, and so far that hasn't helped.
I know that glass can oxidize and that there is little hope of fixing that, but I really don't think that's what I have here. Or at least I hope not.
Any suggestions would be appreciated.
Sorry if this has been covered, I did a quick search and didn't find.