How to get otocincluses to eat algea wafers

[SadSoyBeans]

So i got some otocincluses and some algea wafers for them to eat but they wont get down from the glass, they dont even notice the wafer. And if i drop a wafer down my catfish gets it. Im not sure if the otos are getting enough food, they do have flat bellies currently though.

 

[Brookster123]

Otos eat biofilm, they're most likely wc, they may take prepared foods after a year in the tank.