Atlantic Blue Tang, picky eater?

[Columbo]

My Atlantic Blue Tang is now about a year and a half in the tank. during the first couple months he would eat Hair algae. Then when that was gone he relied on the flakes, nori and occasional frozen stuff. Now I've switched flakes to formula one and he spits the stuff out. The other two fish (coral beauty and tomato clown love the stuff)

So perhaps now the Tang will start eat the hair algae again?

How many days before I give him some of his preferred food?

[LobsterMan]

Go back to yourflakes also try some algae sheets and some frozen mysis shrimp.