Both of these fish have pigeon blood genes, the exception is the male is also an albino. But when you consider the offspring between an albino and a non albino, you have to treat the albino as a non-albino. In this case that would be a red melon (PB based) x a mercury(also pb based).Usually, when you cross a pigeon blood type discus with a blue discus you get lots of peppering in the fry. I hope you grow out a few to 4 inches in size and post some photos of them. It will be interesting to see how these fry turn out.