Hello, I just recently purchased a Senegal bichir and a ropefish as well as 3 giant danio's that the lady at the pet shop said would go well with them. When i try to feed the bichir and the rope with frozen bloodworms that cant get to it before the danio's eat it all. I dont want to risk overfeeding the danio's in order to feed the bichir and the rope so I am confiused on what to do, any suggestions or idea's?