So I bought 2 of these guys at the exact same time and they were the same size and pretty much looked identical. Now one is slowly getting bigger and more colorful. The smaller of the two is hiding all the time and he turns a dark color (pretty sickly looking) does anyone know why this could be? They don't fight or anything and no one picks on them. I included a picture of the healthy one. The other one is really skittish.
![IMG_0979[1].jpg IMG_0979[1].jpg](https://www.monsterfishkeepers.com/forums/data/attachments/399/399634-bccd572bc76b67e603e2795f3425efa2.jpg?hash=vM1XK8drZ-)
![IMG_0979[1].jpg IMG_0979[1].jpg](https://www.monsterfishkeepers.com/forums/data/attachments/399/399634-bccd572bc76b67e603e2795f3425efa2.jpg?hash=vM1XK8drZ-)

![IMG_0015[1].jpg IMG_0015[1].jpg](https://www.monsterfishkeepers.com/forums/data/attachments/401/401130-621f706c37e7471899a14f78616fffe7.jpg?hash=Yh9wbDfnRx)
