Several months ago, i bought two albino senegal bichirs. They were around the same size. They measured at about 3". Now, months later, one of the two is 7 inches, the the other is only 3.5". Is there any reason why one is growing so much slower? The larger one is nearly big enough to eat the smaller one at this point. I know the smaller one is eating. Its normally the first one to the food.