I purchased 4 small containers of different types of food, pellets, flakes ect and combined them all into 1 container... some of the shrimp pellets I broke up with a spoon because my fish are on the smaller side... but I find that when I add a pinch of food... I get a variety every time.
I have also been told that feeding frozen blood warms on a regular basis is bad because they don't contain a lot of nutrients... They are only good as a snack every now and then... I believe its because of when they are frozen... it's like buying crickets that are half starved and you need to feed them gut load before you give them to your pets.