Attacks a Broad Range of External Fish Diseases - Bacterial, Fungal, Viral, Parasitic • Convenient Pre-Measured Tablest - No Guesswork! • Extremly Effective Against Fungus and Ick • With Revolutionary New HaloShield - A Non-Antibiotic Agent Lifeguard™ is a broad-spectrum, non-antibiotic agent that treats the clinical signs of disease at their earliest stages in freshwater fish. Added to your aquarium water, the powerful oxidizing action of HaloShield® attacks and destroys disease-causing microorganisms. You don’t have to be a fish expert to use Lifeguard.™ With this all-in-one treatment, there’s no need for time-consuming guesswork. Each pre-measured dose treats infectious ailments such as fungus, ick, red streaks, milky or shedding slime, flukes, bacterial gill disease, mouth and fin rot, clamped or torn fins, and ulcers. May be used as a preventive when adding new fish.