Cleaning Used Aquarium

CLR is just acids, water, and a little bit of grain alcohol. All water soluble, nothing sticky. Muriatic acid works well, too, but I at least have not been able to find it in convenient spray bottle form.
 
I decided to try it on the glass light strips that came with it, they look exactly the same as the tank. I let CLR sit on one, and vinegar sit on the other side for 20 minutes. The scrubbed. As soon as they dried they looked exactly the same. There's nothing to scrape off, the glass feels smooth. Is it possible that this crap is permantly on there? If I can't get the light strips clean, I don't know if the tank will get clean. /cry

I look at my other tank

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and then look at this one and I jsut want to cry.


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Not to mention it's driving me crazy thinking my water is messed up when it not. So is it possible it's permanent?
 
Might as well give it a shot. I have only once come across a tank that wouldn't come clean; it was like the calcium was inside the pane.

And if it doesn't come clean, well, you might need a big sump someday!
 
Yes, worst case scenario save it for a sump. I hate to say it but based on the striations in that picture, I wonder if that isn't etching or scratching like someone tried to clean the glass with steel wool or an SOS pad. IF so try a glass wax or finishing pad of sandpaper made for glass.
 
Weird, don't know what to recommend. Seems awfully even for a steel wool cleaning to have done it. Maybe contact a local glass shop to see what they recommend?
 
Steel wool dosent scratch like that. i use it alot to clean deposits off of glass.
 
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