I've been candling this evening and have a couple of situations with the air sacks I'm a little concerned about. was hoping some of the experienced folks can help me out. Some have what looks like swooshy air sacks, when you move them a little it looks like the air sack is fluid around it, not fluid in the air sack, the only way I can word it is it looks swooshy. The other situation is bigger than normal sir sacks. They seem to possibly have a chick in there but the air sack is at the top and coming down a little on two sides. Any ideas on these two situations? Also I hear of folks being able to see the heart beat and really can tell if an egg is fertilized or not. I'm sure to know what one is looking for comes with more and more experience. However I would like some suggestions as to a good brand of either a candler or flashlight.