Hello Steviebo5!
If the other suggestions made here do not work, you might want to get some ghost shrimp and put them in your
DT. They will stay alive until your lion decides to eat them and you should be able to purchase them at your
LFS if you can not collect them in the wild yourself. At least this way, he will have access to a food source when he does decide to eat. I personally use only live marine food sources as freshwater fish/ livestock for feeding purposes die quickly due to the salt content and also have too much buoyancy and tend to stay at the top of the tank. I did the freshwater live food one time and that was it for me. Also if you have too much flow going on in your tank, that could be another factor that comes in to play. I had to gradually increase my water flow in the
Dt for my lion to adjust and adapt to his environment. Just a thought.