Originally Posted by lucyinthesky
well items like glass should be fine - as they hold no paints / dyes that may affect the tank.
Well actually a LOT of colored glas is actually just painted. (Talking about the see through stuff)You'll want to test any colored see thorugh glass or otherwise by leaving it in a bucket of water for a few days or a week. If any of the color scratches off after a while then it's no good. =[
I know this because I've been looking for way to make tumbled glass for my own tank and on a tumbled glass forum someone bought a blue piece of glass to tumble and it ended up being regular clear glass with a blue see-though coating fired on. =[ She spent a ton of time on that batch too. =[
So just make sure to be careful! =] Oh! And you should look into tumbled glass! It's beautiful! <3