The 3rd pic looked good. Either you got a new camera or you're getting more experience taking aquarium pics. Good job! The polli should color up darker when you add dark sand. Bichirs have the ability to camoflouge to their surroundings.
That tank doesn't look too big, what are the measurments?
Pics are allright mate, if you are a beginner in taking aquarium pics. Beautiful Ornate, the Polli is kind of pale, but looks well fed =D.