Originally Posted by keith1964
Unfortunately I have loss all my breeding pairs as I spawned them immediately when they were imported for me from Thialand. The downfall of imports they do not adjust to our waters for very long therefore I would spawn them immediately. As you would see in my threads that I have loss all my adults and now I have raised their fry for my future breeding programmes.
IMO/IME it's not due to water adaptation. It's more about care differences. I too can't keep a bought fish for long - same water, same climate. But my fry can live longer than the average bettas in my area. As long as you have fry, it's not a loss.
BTW, did you breed all the above pairs at the same time?