I never used one but there is a filler for winsheild glass nicks. Call a local glazier and see i they can reccomend something. What are you putting in it? thats a good sized tank.

If it is just spots and not cracks try fine steel wool. The kind they use for gun stocks, or refinishing wood. I had to do the same for the 30 gallon I'm using now. It is an antique.

Hi
they look much like the spots you see on shower doors.
I used CLR and as soon as it dries they reappear.
What about jewelers rouge?? Made specificly for polishing lenses?? Would have no idea where to get it I may try the steel wool to see what happens. They're only visible when light is at an angle.
Woeisme
Not sure as yet,Started out to be a collection tank for a seep wall but don't think I'll find anything cheaper than free.lol. i will grow some plants for sure and since it will be soft and acid probably tetras. Thanks to everyone
gary

lisql
It worked !! But you forgot to mention that it was a lot of work lol. Thank heaven I only need to do the one long side... Thank you very much
gary

Doesn't everything require work? The tank it's self and the fish will be work, Right? LOL. It made a hude difference on mine. The friend that gave it to me thought I'd actually gotten a new tank. She said it had never looked that good for her. You are welcome.
Liz