What is the main cause of Hemorhagic Septicemia (red/bleeding streaks on fins and body) This is mostly the only disease I get, and treat it w/ jungle fungus clear, which clears it after a day.. Always appears on my small koi first, water parameters are ammonia 0, nitrite 0, nitrate 30, I do weekly 40% w/c's or even twice a week if i'm up for it..Anyone please??