Kale is an excellent food for Bushynose Plecos or any that eat greens. Buy a bunch and freeze in a plastic bag. To feed it I clip a piece to a plastic clothes pin to make it sink. They don't eat it right away but wait for a day or two until it breaks down and then swarm it. The most nutritious food they can eat.
Food Fact: Kale is a form of cabbage that contains all 9 essential amino acids needed to form the proteins within the human body, plus, 9 other non-essential ones for a total of 18. It also contains more omega-3 than omega-6, which is almost unheard of in nature. Its nutritional density, in fact, is virtually unparalleled among green leafy vegetables.