I was just curious about what you call koi endlers...
Just watched the video link. I do see chili endlers which do have a lot of the störzbach gene with magenta. Two characteristics which are very dominant within the strain of chili endlers (aka red scarlets). A reasonable part of the male offspring of chili endlers will be phenotypical like this. And the other part will be typical phenotypical red. If not culled on a frequent bases, the magenta and störzbach genes will take over and will phenotypical look like the pink endlers as seen in this vid.
I was curious about the name koi endler... I've been breeding endlers ever since 2004 and to me a koi endler should look differently. But names can differ in each country to be honest...
But nice vid though...