Broad-Spectrum Antibacterial Treatment & General Antiseptic for Aquarium Fish Plantoz Bact-Yellow is a powerful, neutralized acriflavine-based treatment designed to combat a wide range of bacterial infections in both freshwater and marine aquarium fish. It also functions as a general antiseptic, helping to maintain a healthy aquatic environment and prevent the spread of infections. Key Benefits: Effectively treats common bacterial conditions such as: Fin rot, Tail rot, Mouth fungus, Columnaris, Carp pox, Brooklynella hostilis, Costia (Ichthyobodo necatrix), Acts as a general antiseptic, supporting fish health during periods of stress, injury, or after handling. Helps prevent secondary infections caused by open wounds or compromised immunity.