My 3 inch juvi grew to 8 inch adult in about 22 months, still has a few blue stripes (like 2 or 3) around the top of his head in the yellow area, but all circular pattern has disappeared. This was the first time I was able to raise a juvi to full adulthood, on my 3rd try. He is on a 125G with a blue tang that grew at about the same pace and a couple of ocellaris clowns, a coral beauty (whom he chases whenever he sees it), a six line wrasse and a flame hawkfish. He grunts a lot chasing the blue tang. I was going to buy another inhabitant, probably a B&W Heniochus, but since everybody is doing so well, I'm afraid of disturbing the balance.