It's normal for Guyana Ocells to turn dark before brightening up. I believe Monster Fish Master had the same effect as your current Guyana Ocell. Water quality also effects color of Pbass. Look at Scat(opatehdg) sp. is way off, Black water thread. Look how different his Kelberi's look.
This is a picture of a Guyana Ocell from Aquabonito.