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- Jun 24, 2019
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Hi everyone, my first post here.
My pond water (6 by 6 and 3 ft deep on one end) was getting thick with algae, I did a partial water change last week, a little more than half total, the fish still seemed lethargic and were wanting to stay near the surface under the waterfall, and water clarity kept getting worse. Yesterday I did an almost complete water change, keeping the fish in the pond with 6 in of water on the bottom. I rinsed out sediment that was in the rocks and kept water flowing as my pump pushed water out at the same time. This was kicking up some chunks of decayed material, but did this gradually and got most of the debris out. I then removed the pump and started slowly filling, and added stress coat and beneficial bacteria as it was filling. The fish seemed to enjoy the turbulent water, and they were swimming around after it was completely filled, but maybe a little lethargic. This morning I found my 13 inch 3 year old koi at the bottom of the pond. The other seem to be in okay shape, 3 10 to 12 inch koi and a dozen goldfish. This has a UV filter, this didn't keep up with the warm weather bloom in North Carolina. Do you think it was stress from temperature change, too much sediment in the transition, or actually removing too much bacteria and original pond water, that caused the death of my biggest koi?
My pond water (6 by 6 and 3 ft deep on one end) was getting thick with algae, I did a partial water change last week, a little more than half total, the fish still seemed lethargic and were wanting to stay near the surface under the waterfall, and water clarity kept getting worse. Yesterday I did an almost complete water change, keeping the fish in the pond with 6 in of water on the bottom. I rinsed out sediment that was in the rocks and kept water flowing as my pump pushed water out at the same time. This was kicking up some chunks of decayed material, but did this gradually and got most of the debris out. I then removed the pump and started slowly filling, and added stress coat and beneficial bacteria as it was filling. The fish seemed to enjoy the turbulent water, and they were swimming around after it was completely filled, but maybe a little lethargic. This morning I found my 13 inch 3 year old koi at the bottom of the pond. The other seem to be in okay shape, 3 10 to 12 inch koi and a dozen goldfish. This has a UV filter, this didn't keep up with the warm weather bloom in North Carolina. Do you think it was stress from temperature change, too much sediment in the transition, or actually removing too much bacteria and original pond water, that caused the death of my biggest koi?