Broken Glass in Tank

Done and done.

I had that fear because I do have a sand sifting goby but at this point it's like finding a needle in a haystack

The piece I pulled out of my hair was like a needle. Those test tubes have such thin glass and this was just a shard. It would have ran an inch deep if I had ran my fingers through my hair. Luckily I hit it sideways scratching my head

 

This would be my only concern too..
Or if you have fish that like to get a mouthful of sand while looking for food ..

 

Come to think of it. I didn't see my sand sifter today. Hope it's just in the rocks somewhere and the worse case didn't happen.

 

Only issue I can see would be with sand sifting/tunnel digging fish possibly cutting up there mouths and gills
Other than that I don't see any real problems
Oh and maybe the occasional piece of glass in your finger while cleaning the tank