The only thing I can add to this discussion is that I have a spring fed flow through pond with no aeration for 2 years and the YP are doing great. The bottom water temperature is 72 and surface temperature is 84. My suggestion is to get YP from someone near you (Snipe, Rainman) and they will do just fine because the YP they have are accustomed to your climate. That’s what I did and it seems to be working so far.
