I came back from a 9-day vacation. I kept my baby flowerhorn fed twice a day by an automatic feeder. The water parameters are all safe (I have a section blocked off from the rest of the aquaruim for plants to grow, and it keeps the nitrate and nitrite at 0 ppm). He seems as he wants to eat, but he can't for some reason. He goes up to the food, almost rushes to it, then stops. It doesn't appear as his vision is impaired, I showed him a freeze-dried bloodworm in front of the glass and he followed it, but like I said, he goes to the food, and then stops. Can someone explain what is going on?