The media could not be loaded.So far, this is tumbling my eggs well. I will not make the review dependent on if the eggs hatch, since I am not sure if I was even able to rescue the eggs in time from my berried cherry shrimp that passed away. This thing is nice and compact, and crystal clear to easily see the eggs gently bouncing in the current created by the air bubbles. The top mess holds in a bubble that pops every second or so, causing the eggs to bounce up and gently tumble. It is kinda fun to watch.The air tube is very thin glass and very delicate. I ended up snapping it when I was trying to put it together. That was fully my fault, and I should have been more careful with it, so no star deduction there. I was able to get it back on with some CA glue and seal it with some silicon.My only complaint is that the top opening seems a bit small for the provided mesh. After fighting with it for a few minutes to no avail, I ended up shaving some of the silicone off around the outside. Were it not for that issue, I would have happily given this five stars.