I have a 3 foot deep outdoor pond with comets and koi about 6 years old. The comets have started to die, first one now and then, but now quite a few. I'm in Maryland and it's been a mild winter. I have a leak and have been feeding water in constantly from a well. It used to fill from our big spring fed pond. It's aerated and they have been fine previous winters.
Pond and Fish deteriorating
- Thread starter Mina
- Start date
- Joined
- Jun 11, 2012
- Messages
- 7,046
- Reaction score
- 7,240
- Location
- Water Valley, Alberta
- Showcase(s):
- 1
- Hardiness Zone
- 2a
- Country
Have you done any water tests?
Can you describe the filter setup and water circulation?
What are the other dimensions of the pond?
Can you describe the filter setup and water circulation?
What are the other dimensions of the pond?
Meyer Jordan
Tadpole
- Joined
- Oct 10, 2014
- Messages
- 7,177
- Reaction score
- 5,675
- Location
- Pensacola, Florida
- Hardiness Zone
- 9a
- Country
In particular, have you tested the source (well) water?
sissy
sissy
- Joined
- Jan 17, 2011
- Messages
- 33,086
- Reaction score
- 15,702
- Location
- Axton virginia
- Showcase(s):
- 1
- Hardiness Zone
- 7A
- Country
I am guessing here that koi are bigger than the comets .Usually bigger fish die first .Testing water is important .Have you taken the dead fish out right away .