I was early for work today and decided to go to the beach that is right next to my work (Lake Michigan) and as I was walking along the beach, and looking for cool rocks for my tank I saw something that looked really familiar...
Sea Glass! (lake glass

)
I was wondering why there were so many pieces, but then I figured that since it has not been above 50 degrees since the September, people don't go to the beach as often, and therefore don't take the sea glass.
I came home with a little treasure!

and I want to see if I can add them to my tank safely?

just to be on the safe side.
Thanks!