How to get your fishes eat other food?

[Chin_Lee]

don't feed them until they eat what you want them to eat. sounds mean but it works. I used to have this ref fluff algae that was going out of control in my tank. My tangs wouldn't touch it until I stopped feeding them. 8 days later of fasting, they were chowing down on any red fluff in the tank.
I have some hair algae in my frogspawn and I did the same thing. Placed the frogspawn in my sump where I have a blonde naso and two yellow tangs. Then I stop feeding. Hair algae all gone within a week. I suspect it was the naso that ate it though.
The only problem is the small fishes that you also have in the tanks like firefish and small clowns. I suspect they will get weak after a long fast so target feeding them may be required.