Fantail Goldfish Off Food
I have 3 fantail goldfish, but over the last few days, 1 of them seems to be off its food. I have switched to peas over these last few days, just to see if he is a bit constipated.
Water quality is good, nitrate is a bit high (20ppm), but the other thing I was wondering is if he can actually see the food, as he seems to be aimless swimming around not going for food when it's right in front of him. He does eat a few bits, but doesn't seem to be hunting for it like normal.
He seems a bit lethargic compared to his usual self.