Hello everyone, I have a Doitsu Sanke that has started acting abnormal. He'll swim into the walls and in circles, looks like he's hurt his spine. Water samples all came back with no issues ( 0 ammonia, 0 nitrite, 8.3 pH, 200 Kh) and I did a scrape and didn't see anything. Hes the only one acting like this. To be on the safe side, I'm on day 2 of a Microbe-Lift broad spectrum treatment. Ive attached a youtube clip that may help you more experienced koi keepers. Thanks for your help.