Guess the trick is to hold them in a separate "hang-on" holding container in the main tank itself and do all your "training"
from there rather than to release them immediately into the main tank and be left to their own devices. Being as slow as they are .... gonna lose out on competition for food(should you have other faster and more buaya fishes !!!!).
Currently, holding mine in a holding container and will release them once I am pretty sure I have a good population of pods.
My only worry is after having a taste of pods, they might not like those frozen food anymore (hmmm.. back to square one then).