i have 3 neolamprologus meleagris 2 are very dark and the smallest one got lighter and more gold i noticed they all sort of change color a little bit i was wondering if this was normal and if not how do i fix it thanks guys
http://img35.imageshack.us/i/dsc04240fz.jpg/
http://img715.imageshack.us/i/dsc04236.jpg/
http://img35.imageshack.us/i/dsc04229mp.jpg/
http://img35.imageshack.us/i/dsc04240fz.jpg/
http://img715.imageshack.us/i/dsc04236.jpg/
http://img35.imageshack.us/i/dsc04229mp.jpg/