Adding garlic to feed?

[Aquat]

I've seen Garlic Xtreme at most fish store to help with appetite and nourishment. But is there a way I could add my own garlic to the feed?

 

[Saltydrip]

I have read about just buying garlic extract at the super market. It's perfectly safe. Garlic extreme is just a more concentrated version. I use it to get a picky kole tang eating.