I have a Kelberi that has stopped eating. Today he acted hungry but would struggle with the food then spit it out. He has been eating great. I feed tilapia to twice a day. Another interesting thing is I noticed at the base of his fins to his body are really red as well as his top fin to body. I don't know of that is anything or not. I will attach a picture of him. Water parameters are all in check. The others are eating well.
View attachment IMG_20170531_065124750.jpg
View attachment IMG_20170531_065124750.jpg