as other folks, you need to your home to be the best place where you possibly can really feel comfy with. if the black markings are concentrated in one area, such as near the tail, or all on one side, it creates an un-balanced and busy look. while they’re reading, they can’t easily listen to you. if you see that it’s not effective, contact a doctor immediately! is this the platinum carbon pen? at our pharmacy, you're treated like family. she will create a collection for your specific needs. please do ask me anything whether diving related or not. 