I was wondering if the reason my fish has a red eye is because the water still has chlorine even though i dechlorinate it. My pond is 125 gallons. I have plant life growing...elephant ears and lily pads (not sure how elephant ears started). I believe my fish is koi (all white). My fish is 10" long. I notice on occasion it gets a red eye. Any suggestions about how to treat the red eye? Is my fish okay?