Please help me i am loosing my Koi quickly. I have a 800 gallon but, it was recently hit by a herron. He killed 4 of my fish, the rest of my fish are stressed. I loss a fish to ick three days ago and I loss another on last night. I have the herron isssue resolved. I need help with the ick issue. I have four lilies, and one iris in the my pond. I have a black 5ml liner, and I have slate through out the pond with a river rock bottom. I have a skimmer which feed a UV, and comes out a small waterfall. I also have a filter which feeds a larger water fall. I put 5 pounds of aquarium salt in my pond yesterday. I have seven fish left how can I save them. I was going to move them inside temporary and drain the pond, and power wash everything. Can you help me. Thanks Kim