Kallax balls are a great grazing food for your smaller shrimp colony of <50, as opposed to Lubao which are for larger colonies of shrimp. These balls are stuffed with amazing products that create biofilm for your shrimp to graze on in between feedings, or while on vacation. These will not foul your water when used according to directions.
Kallax will produce biofilm for 30 days and be a constant natural food source for your shrimp. These are a great benefit to mature aquariums, as biofilm availability becomes limited as your tank matures and your shrimp colony grows. You can also use these while cycling your tank, as it will provide a stable bioload for aquariums with inert substrate or soils that do not leech ammonia.
These should not replace normal feeding with pellets and leaves. This is for supplemental feeding.
**In case the ball breaks open in the tank, remove all debris with a small water change