Dear Gee, That's a terrible loss...22 large koi...We (Massachusetts) also had a terrible winter, I had cancer so I was attempting to tell other people what to do with the pond. With ice almost a foot thick I feared the worse, but was very lucky in t…
A 5" hole is too small. My guess is CO2 poisening. You may have got away with it past winters because the koi were not quite as large or there may have been better gassing off, but the fish being up at the hole and since last winter was a bad one, t…
Beth. How clean was your pond bottom going into winter? I ask because even an inch of wastes will start to decay and cause a spike in Ammonia, and carbon dioxide levels as well as a increase in the water temperature, and drop in the PH. It may also…
For five to go in one day I would look into maybe electrical issues from the heater. What is your water temp? Cold water is hard on the koi, but yours have been thru it before and have made it. With that said, I would check all your water parameters…
I live in Upstate NY. My pond is 10x12 x5 feet deep. I had 6 large koi that had over-wintered 3 winters. I use a bubbler or a stock tank heater to keep a hole in the ice. This winter 5 out of my6 koi died (all the same day). There was about an inch…