This Section Is For Advanced Hobbyists Discussing new original cutting edge Experimental and Trial Treatments and Surgical Techniques, here we take koi health and pond keeping to the next level
Hi Carl
I have a chag with virtually the same damage which was done on either the side drain or one of the airstone's. These are the only things that any damage can be done on and believe me they will find anything they can to damage themselves. The damage to my chag is near her tail on her side, so I can see how you are finding it hard to see how your chag could of damaged itself but you will be surprised what they can do. Thats why we love them.
Glad things are improving though