I'm glad to see people captive breeding silvers. If we're not careful with the wild silvers, they're going to end up like the Asian aros. He's sitting on a gold mine with that black silver. If he would breed, that would be some expensive offspring...
well if it really is recessive gene (and not a mutation)
then you could mate this black one with a regular silver, and you would get babies that have a Bb genotype (make a punnet square like they teach you in college and high school) so if you breed two of the offspring who have the Bb genotype, then theres a 25% chance of the F2 generation having the bb genotype.
make any sense?
but i think melanistic is a mutation, not an actual gene