Etched Glass! Help!

[Amador]

Hello all, I am working on setting up a 125g aquarium that I bought used. Trouble is, there seems to be a water line 'etched' into the glass from the previous owner. Here's a pic:

You can see the line about 1" below the bottom of the trim.

My question is, is there something I can "soak" the tank in to remove these marks? Some sort of acid or base added to some water? I've tried using the usual: vinegar, glass cleaner, lime-away .. even muriatic acid! No luck.

If anyone has experience with this, your insight would be GREATLY appreciated. Thanks.

 

[AllenFord_SC]

Vinegar and water and one of those green brillo pads. Make sure it is the kind without the soap or detergent in it.

 

[Amador]

Thanks for the suggestion, however I've tried that to no avail (see my edit).

 

[scrmbld33]

would that CLR hard water stain remover work???

 

[Rockhead21564]

man, if you used that CLR, I'd have to soak/rinse/soak many times to make sure nothing of residue was left.

 

[Amador]

I've tried "lime-away" and it didn't work. Not sure about CLR, but most any product I've tried didn't work simply because the glass is etched. The contaminants are inside the glass, not on the surface where a solvent can work. That's why I was asking about soaking it somehow, to let the solvent penetrate.

 

[BlackOnyx]

if you fill the tank you wont notice it will you?

 

[shag26272]

I think you can use muriatic acid maybe someone else that has done it will post about it.

 

[ravenr]

fill the tank...you wont see it.

 

[Amador]

I have some 250w MHs that I am planning on using. Would the etching in the glass show when filled when using the MHs?