DrDave said:I think you may have just identified the problem. The oil may have been ingested by the affected fish.
No, I seriously doubt it. I didn't even get these two fish until 2-3 weeks after the contamination and several pond flushes.
One of my prized Koi, developed a crooked spine shortly after my wife sprayed around the pond with malathion. I found out that malation can cause the condition my Koi had.
Timber Oil is not malathion, an organophosphate poison of intense toxicity. AND I didn't spray around the pond. Only maybe 4-5 ml dripped into the pond. Because it was oil and floated on the surface it affected the water hyacinths, I think. However, the fish were not on the surface and I didn't feed them.
Oil is lighter than water and a droplet could have attached itself to a pellet that was eaten by this Koi.
See above. I didn't feed them for a day after the contamination. IF it had been the contamination, why then are none of the other fish affected who WERE in the pond at the time.
This part is for everyone on the Forum...Why does it always take so long to get all the facts? People, when you have a sick fish, gather everything you can think of before you panic and ask everyone for help. Some of the answers you get might kill your fish if all the facts are not known.
#1 I didn't panic.
#2 I didn't state these facts initially precisely for the reason that someone would jump to the conclusion that the oil was the problem and dismiss other possibilities. I ONLY mentioned the oil to explain why I did a total filter clean up which I know is otherwise not such a good idea.
#3 Wilde is doing better. Swimming almost normally now, if not totally normally.
The information I did get about possible constipation, soaking the pellets before feeding, varying food type and avoiding feeding for a day or two was MOST helpful. I may not have gotten any of it if I'd mentioned the timber oil.