aquatronics cravex

[Invigor]

has anyone used this? I'm using this on a tang at work to entice it into eating. It came from the vendor pretty skinny so I've been using this "cravex" to help it eat. It's a water additive not a food additive. It claims it adds amino acids and vitamines to the water and stuff...just wondering if my skimmer will pick this stuff out or not?

Logic tells me it will.. any ideas?