Impaction can also occur when there is a blockage such as Triggers and Puffers that chew on Powerheads, Fake corals and so on ....... Lions at times will gulp sand, however many times when I hear of a lions death caused from impaction, these two questions come to mind.
What did your lions diet consist of?
Feeding a lion the same foods overtime can cause a blockage in the gastrointestinal tract
How large were the chunks?
When a lion is Fed large chunks and unable to digest the food, the food will rot causing death.
My Lions eat Fresh Frozen Peas thawed for greens, you can place them on your feeder stick.
I am also interested in hearing more about the freshwater dip when it comes to blockage, this is the first time I have heard of doing a fresh water dip for this.
Kaye