5.9% BF , but abs aren’t that defined?

Hello, yesterday I did a body fat test with GNC and it said my BF is 5.9%. I weight 189lbs at 6’2. A year ago I was up to 8 percent and my abs look better then but I’ve gained muscle and lost body fat but still my abs look worse now?? I don’t know if this is from drinking a lot of water or what? Any help would be great with this

from Bodybuilding.com Forums - Nutrition https://bbcom.me/2SuDXp7