First, you may want to consider seperating your goldfish with your other fish. They require a lower temperature of then your tropical fish. I believe anything colder 65 f. Your tropical fish require 75-82 f, so you'll need a heater.
A lot fish are picky eaters, I think the key is variety. Frozen blood worms or brine shrimp is a good supplement. Flake food, pellets, etc. They're isn't one product that they would do best.
Bamboo shrimp seem to chance eaters, so they feed off food particles in the water column. Here is link that is helpful: http://www.theshrimpfarm.com/shrimp/bamboo-shrimp.php
The stuff you bought should be a good supplement for your bamboo shrimp. Happy fishkeeping!