Yes he is very pale and that could be because he is a little stressed because he is new but probably because of your white sand. I recommend you remove the substrate or if you have to have it go for a black or red sand. Yours looks to be related to the vieja so the kok growth is usually prolonged so it could take a while if their is going to be any kok. Don't expect fast kok growth like an srd. Like Tsn said only time will tell.