| Tetra's DesaFin Pond Fish Medication Prevents infection. Destroys parasites, bacteria and fungus. Helps prevent ick. TetraPond DesaFin protects Koi and Goldfish from harmful protozoan parasites including Ichthy9opthirius multifiliis (white spot), Costia, Chilodonella, and Trichodina. Also protects Koi and Goldfish from bacterial infections | |