I'm not sayn its not in the genes. This study found that higher heavy metals levels during the egg stage produces higher levels of albinos.these are studies from professionals not some hobbist in his backyard.copper can cause heavy metal levels it isn't toxic like mercury n such.I'm also not sayn I would expose my breeders, eggs, or fry to heavy metal if I can help it. I just found it interesting. They actually did field tests where high numbers of albinos occur in south American riverways.they took their findings to the labs n confirmed that heavy metal does increase the chance of albinos.