I never said you were doing anything wrong, Colleen.
I learned long ago that if I wasn't able to get my message across to people in a way that they could understand, they wouldn't get my message.
All I'm saying is that if you had some basic measurements like temperature observations, PH, KH, GH that we could compare numbers, then we could better understand why some people have difficulty and why some have success.
- because right now all everyone's arguing over is who has has a more legitimate opinion - which isn't getting this discussion any further ahead.
For example, if you do a search for "physiological effects of cold water on koi" or better yet "physiological effects of cold water on Amur Carp", you can come up with some actual studies done that show how temperature affects these cold water fish.
Don't bother looking for opinion pieces, look for actual scientific studies. Google Scholar has a lot of information.