I thought i was buying a platinum jardini from one of my lfs, but before I bought it I went to my other lfs and they told me its my gravel color, I dont know if thats true though
The blacks need better water quality and they are slightly more picky eaters. They also grow slower. Ive got a couple of silvers in a different tank, and they eat way more. I just keep on top of my water changes, and feed gut loaded crickets a lot.