Hi guys. My brown mystery snail, Ajay, has changed color rather drastically since I got him. He used to be just a dark brown but now he has distinct streaks of dark brown, light brown, and black. Is this normal while they mature or could it be an issue of my water? My water is on the softer side, not quite sure exactly but I do know it is softer. I bought three other snails the same time as him and they have all changed colors but he is the only one to have three distinct colors. The rest either got darker or lighter from when I got them but stayed a single solid color. I do like the pattern but I've never seen it before so I'm not sure if it's normal or not.