Frosting Glass

[JellOh]

I'm setting up a divided betta tank with glass dividers. I'd like to frost them so the bettas can't see each other. The problem is, I can't find any ways to do this other than things like spray on paint or armor etch, which I'm hesitant to use on the inside of an aquarium. Any help will be appreciated

 

[techen]

Could you not use a blowtortch on this? Wouldn't it go white instead of clear? Unless it's glass then nevermind.

 

[m00ms]

could get the glass divider sand blasted with fine sand.

 

[DrRob]

I'd go for a quick sand blast, will frost most see through surfaces nicely. Or just glue a thin sheet of foam to it.