I've been feeding my Arowana, Clown Knife, and 2 Peacock Bass frozen bloodworm when they were small, then they were feeding on FD Shrimp. My Dad came back from Thailand with some pellets for them to try out. They spit it out the instant it touches their mouths. I didn't feed them for a week thinking that they will eat the pellets by then. I fed them nothing but pellets and it just ends up sinking to the bottom. They don't eat it! Did I spoil them?