Help! 2 died .. 1 not looking good :cry:
I keep kois in a fibreglass pond. 'B' shaped 1.4 in length, 0.5m in depth. build-in filtration system. There were 4 kois (approx 60cm) and 4 other small ones (approx 15cm) and a small catfish
It happened very fast. i noticed that the fish were swimming to the surface alot, staying stationary in a vertical position for a long period of time. Thinking that it's probably the lack of oxygen in the pond, i changed half the water hoping to improve the situation. Apparently, it didn't help much and the fish continued swimming to the surface. After about 5 days, which is today, a fish turned up dead.. about 12 hrs later.. another died.. both were the larger kois
Presently, one of the large koi is still adopting the vertical postion close to the surface. i hope it wouldn't die.. Help!!
Is it the water?