| Very stressed fish can lay on there sides like that. Or it could be more problems such as shown in the link below, I can't remember if you salted the pond to help with the nitrite problem but salt now would help a stressed fish. I would take the whole pond up to 0.3% (0.1% a day) rather than keep stressing it even more trying to catch it. Also some medicated food may help with a possible bacterial infection but it could just be stressed. |
Here is a link that might be useful: Layover