Difficulty in feeding Otos with a 7 betta sorority

[SQW]

In my aquarium, I have 7 bettas, and three otos in a 20 gallon. I have some difficulties feeding them. Whenever I feed them algae wafers, the betas get to them first and devour it. I tried blanching zucchini and throwing in a slice, and was very surprised to see the bettas poking a hole in the slice and swimming through it. They devoured the whole thing. How do I feed them? Help.

 

[Coradee]

Hi, try grinding up the wafers into a fine powder, the Oto’s will graze over the plants, wood, substrate etc & get it & the bettas won’t.

 

[SQW]

Hi, try grinding up the wafers into a fine powder, the Oto’s will graze over the plants, wood, substrate etc & get it & the bettas won’t.

I honestly never thought about that. Thanks!