He's turned a dark brown color. The two weeks I've had him he's always been a light brown. He had a feeding frenzy yesterday and did a water change just now and checked the params since I know they're sensitive to and everything is good to go. For a few minutes after the water change he turned light brown but now he's dark again. He ate a shrimp that went right by him as I was writing this. I can't find much info. I'm just hoping he's just changing dark for no reason.

