I think in dutch architecture integrated systems, we might have to use warmer water. I mean systems that are part of office / home temperature buffering and heating. Then a temperature of 25 degrees is to so strange. In the winter, spring and fall, you'd add energy anyway because you are making a climate for the humans. A lot of that energy can come from a passive solar collector. In winter aided by WKO.
Thats why I would love to learn about african catfisch as well al european. So if you can find them Els, then I think we can.