Emergency Measures

I've removed approximately 3/4 of the water volume from the pond. The hose is refilling is at this time, and I'm dumping in salt and dechlorinator. While I realize this action is stressing the fish while they're in a weakened state, I felt the risk of NOT doing it was greater than the risk of doing it. And I'm trying to put enough salt in to help the fish heal, but not so much that it will damage the plants...although I care more about the fish than the plants right now.

I really wish I knew more about wtf I'm doing with all this. I feel like a very, very bad koi mama right now.