When I bred kribs I never tried breeding 1 male with 1 female. This combination is very hard to be successful. With kribs I normally
buy 2 males and say 4 or more females. The alpha male will generally kill the other male in the tank and then choose a female
for him to breed with. I normally leave them breed in the comunity tank for the first tiemand then remove them in a seperate tank
if I want the brood to be bigger in quantity. Then you can be sure you have a breeding pair.