I believe that the red "stuff" is just coloured alcohol commonly used in thermometers (no problem with such a small amount). The beads as everyone has said are lead shot. The lead shouldn't be a problem at the pH of your tank (i.e. won't leach over time). (If your pH dips low enough to cause leaching you have bigger problems to worrry about
). My biggest concern would be the fish ingesting glass and if its still ok then the worst has past. Have you posted of picture of this monster fish?