FW dips are only good to determine if it is ich, velvet or flukes. If white spots and they don't fall off in FW dips then it is ich. FW dips only works to dislodge velvet and flukes from the fish's body. It does not cure it.
Hypo only works on ich, not velvet or flukes. Copper works on ich and velvet, but not flukes. My personal favorite copper med is Cupramine. Fluke tabs or Prazipro works on flukes.
Like ken6217 said feed him and see how things go.