[Need Help] Cleaning a fish tank, I have a problem...

I agree. I used CLR and all sorts of things on that 225 I was doing. you can run straight vinegar on it without any issues. Get a good razor and have at it. amazing what a razorblade and vinegar can do.

you can also use a scotchbrite pad too..

 

This was just vinegar and a razor.

Before:

After

 

Thanks guys. Looks live of got to go the store tomorrow.

In regards to whomever suggested buying a new tank...I could, but I am just trying to use what I have before buying more.

 

Holy crap! I didn't know vinegar could warp the tank trim like that. ;D

 

Seano - You may end up spending more than this trying to clean up an old tank that may end up leaking. You might want to consider this option.

 

Reeron. LOL! nope, that was not acomplished by vinegar. that was just after I took the end pane out.

 

The tank isn't & hasn't ever leaked. I had it a while back & let it o bad(I know I shouldn't have). That's why there's that scum on it. I just need to get some vinegar & something to scrub/scrape with.

Oh & the seems still look good as new. I think the tank is like 15 yrs old.