Here, try this instead of live fish or the hermit crab food.
Meaty Foods
Pellets
Shrimp
Krill (if freeze dry be sure to soak it in some tank water first to not cause swelling in the stomach)
Scallops
Clams
Squid
Crayfish
Crab & lobster
Fish - Cod, salmon, silver-sides, minnows, flounder. haddock, tuna just to name a few
Bloodworms
Brine shrimp
mysis shrimp
snails
Insects & Worms
Insect Larvae
Crickets
Meal Worms
Earthworms
Wax worms
(Always be careful they have not been exposed to any chemicals)
Veggies, Fruits & Nuts
Peas (frozen right out of the bag...no need to de-shell them)
Algae wafers
Bell Peppers
Zucchini
Squashes
Carrot's
Garlic
Mango's
Orange's
Pear's
Bananas
Blueberries
Papaya's
Peach's
Grapes
Spinach and leafy lettuce (not iceberg)
Peanuts
Pecan's
Feeding your fish many of these foods when they are younger will help not to have a picky eater when they are older.