It might be helpful if people can list the type of vegetables they use, how you prepare it (frozen, raw, fresh, blanched? sliced? diced?) and what type of fishes eat that particular vegetable. Thanks in advance.
It probably depends somewhat how big your plec is. I would keep trying. None of mine would eat it at first, but now they go crazy over the zuchini. It usually just takes them a while to figure it out.
He should take to it eventually. Then you won't be able to keep up I don't do anything to mine, I just feed then raw.. Mine likes the wafers a lot too.