I feed my fish a vaired diet of about 7 different types of food. With food of low nutritional values I soak them in vitamin supliments & of course garlic to ensure that all my fish stay healthy but its never the same meal twice in a row, unless Im just to lazy!!! I do not use blood worms as a staple food & I agree with justinl, my mandarin has enough to eat in my system. I only sugested that when you have a stubborn fish that wont eat & by trying diffrent things you could get them to eat something & hopefully with time eat something good
. I also should have said that a mandarin needs to be in a established system first of at least a year to be safe. Just tying to help
