Do frozen shrimp if the tank has other tankmates that will go after it. It will realize that it's food. The risk about frozen shrimp at first is it sinks and the thin bar will lose absolute interest if the shrimp made it to the ground. You want the thin bar to get it while it's sinking.
Dried krill has a higher success rate in the beginning for thin bar IMO. It stays on top of the water to tempt the thin bar to get it. When the thin bar is hungry enough it will dash for it.
Dried krill has a higher success rate in the beginning for thin bar IMO. It stays on top of the water to tempt the thin bar to get it. When the thin bar is hungry enough it will dash for it.