Waterlife Medizin P treats a wide range of parasite infestations such as White Spot, Velvet, Costia, Trichodina, and Cryptobia in addition to fungal infections. Medizin P can also be used as a disease preventative during Spring and Autumn. Medizin P comes with full instructions for use in different types of ponds and comes complete with a handy measuring cup to make dosing as simple as possible. It is safe with all pond fish and plants and will not damage filtration bacteria.