Beautiful discus Sumer. It’s hard to get them to change food. Als fdbw are my main food. Next I mix a lot of flake foods together. I use California black worm flakes with whatever else I have and add nutri-diet flakes to the mix. The nutri-diet have garlic in them and just attracts the fish to eat it. For me once one goes after it they usually all go after it. Good luck.