fish health

[linda grudi]

My koi fish are dying in my pond, which is clean and water has been tested as perfect. I think the fish are constipated, and they have no desire to eat, which is unusual. Is there a cure or fish doctor that I could contact??
HELP!

[Lady Hobbs]

Could be a viral or bacterial problem has taken over. Could be internal parasites. Could be just about anything, really. Sorry.

Do you have a pump in there delivering oxygen?