Removing salt line

[PeterC99]

I, like yourself tried everything to remove a waterline from my used aquarium. NOTHING worked.

Finally gave up and filled the tank with saltwater. Once water comes into contact with the line - it disappears! Don’t worry about it. You will not see it once the aquarium is filled!!!

Before and after pics of the waterline

 

[JumboShrimp]

I agree with @PeterC99 .... waterlines are weird, spooky, mind-bending stuff. You can’t get it off with a hand grenade. But then you fill the tank with salt water, and within a week... a magical disappearance! I guess that’s why water is called the “universal solvent.” Best wishes.