Hi this is the second time this has happened afte a large rain for several days....a couple years ago i lost 2 huge koi and i just went out to the pond and 3 of my largest koi were dead...no marks nothing just alot of rain in several days...could it be the ph being changed to rapidly.I have 1 left..I am to the point they are beautiful but much too sensitive for outside ponds....i think goldfish will be my main fish from now on...any comments or knowledge would be helpful.....lorraine
:'(