Immune Plus is a disease preventative for all freshwater fish. Protects against ick, closed fins, velvet, body fungus, aeromonas (hole in the head) and vibrio. This is a revolutionary ProBiotic formula that contains billions of "bacterial bodyguards" to protect your fish from disease. It contains absolutely no copper, copper sulfate, copper salts, green or blue dyes, dangerous chemicas, drugs or hazardous pesticides. Safe for all freshwater fish and plants. Treats 1740 gallons.