Seachem Focus MedicationSeachem Focus is an antibacterial polymer for internal infections of fish. It may be used alone or mixed with other medications to make them palatable to fish and greatly reduce the loss of medication to the water through diffusion. Antibacterial polymer for internal infections of fish May be used alone or mixed with other medications Freshwater and marine medication Directions: Use alone or in combination with medication of your choice in a 5: 1