Hi,
I started noticing my large Koi very lethargic and head down tail up swimming sometimes just 2 week ago in my pond. I shifted him to my home aquarium to check what's wrong with him. I saw no white spots and no red streaks or any other spot. So I applied Rid All Medicine with 2 PPT salt. And I saw improvement in just 2 days. Koi became fine in 7 days.
Yesterday I saw one of my small koi very dull and not swimming not eating. He was just bottom sitting. I moved him to my home aquarium as well where I have salt and medicine in water. And to my surprise I see improvement in just a day.
Today I noticed another small Koi missing in my pond and after searching for him I found him dead hiding in a corner.
He too was acting dull and lethargic for a few days.I saw no white spots or no red spots on him either.
Why my fish are becoming ill and dying?
I have white Koi fish too and they are all looking fine eating like a monster. Other two smaller koi are also swimming and eating normal.
I see white fungus on hydroton of my NFT plastic cups.
Ammonia and Nitrites are 0 and Nitrates are between 40 - 80 PPM.
What's wrong here?
