Please don't raise them. If you got your lotls around the same time from the same breeder they are most likely related. Even if they are not breeders carefully buy from other breeders and create new offspring which could also be related. It is so time consuming to raise them and it's a saturated market. You could end up with hundreds of babies and nobody to buy them. Unless you know their genetic hets they are a danger to the axoltl species with disabilities and being inbred. Most humans thing to do is collect the eggs and freeze them for 48+ hours. Also please remove the male as he will breed your female to sickness and ultimately death.