I have a datnioides, he is 2 years old and 25-30 cm. A few time he cant eat, enough, only one (1) freezy fish,!!! always one!! i feed him in my hands. He took the first fish, but the second not. When that problem started that time arrived a same size RTC and a polypterus. Is that possibe the new fish make him stressd? or the freezy fish is bad? Or what? please help me he is my favourit fish i am so much worryd about him...