Recently move my koi and goldfish from a small 300 gal pond to approx. 1500 gal pond. Approx. 10 days after the move , my biggest koi started acting sluggish and laying on the bottom. He is also flashing occasionally. I salted the water and also put in recommended amount of tetra pond fish treatment. I just tested the water and the nitrite is 1.0 and the alkalinity is low. any advice would be greatly appreciated.
Thanks,
Walt K.
Thanks,
Walt K.