The general opinion is that Sanke are difficult and after two spawns I agree.
My first spawn was from two very old fish that displayed the genitic trates I want to promote. I kept 5 fish from this spawn (all turned out to be male). The two largest of these were put to a female I got from a friend. The pick's are some of these offspring I have kept to grow on. At this time they were 8 weeks old.