Originally Posted by
Nordy
http:///forum/post/2765460
First, try a stronger acid solution on the film-something like CLR or Lime Away on a small test area. You may have to soak the test area for 15 minutes or so by applying a sponge soaked in the solution to the glass. Suggest gloves with these items.
When using vinegar, which is a pretty weak acid (5% acetic acid is the usual strength) it can take a while for it to start working on the film, if it is indeed some type of mineral deposit. If using a stronger acid solution does anything at all, the next step might be to soak the entire tank in vinegar-it's relatively cheap, safe, and effective if left for a long enough time in a sealed tank.
If none of the acids work, I would suggest next trying a degreaser, like Simple Green diluted to a medium strength, applied with a plastic scrubber sponge on a small test area. Relatively non-toxic and smells better than vinegar.
Did you get a deal on the tank? How big is it?
Good luck on the cleaning!
You don't think CLR or Lime Away will harm the tank over the long term? I guess I could lay the tank on its side and pour some vinegar and let it soak. I paid $50 for the tank and stand (wood) which is a great deal but only if I can get rid of the film. A fellow reefer told me that he thinks the film will disappear once the tank is filled with water