I use it with Repashy cal med and super vit with every feeding. I noticed my vents and cits turned from a bright lemon yellow to a deeper golden yellow within a month. My intermedius have had it their entire lives, so I have no "before" comparison. However, I feel that they (and one in particular) are an exceptionally deep Orange. I acquired some mancreeks a while back that were not as brightly colored as one might expect for the morph. The male was the color of wet hydroton, and the female was a bronze like the color of fresh leaf litter. After a couple months they have colored up a little, The male is now a brighter Orange and the female looks slightly less brown with her belly becoming pink. I think I read on the forums the other day that naturose works even better, so I think I'll give that a try.