ParaGuard is the only fish & filter safe aldehyde based (10% by weight) parasite control product (for parasites on fish). Unlike highly toxic & difficult to use formalin based medications, ParaGuard contains no formaldehyde or methanol & will not alter pH.
Features: Eradicates ectoparasites, fungal bacterial & viral lesions, will not adversely effect bio-filter.
Directions: Remove all invertebrates from the tank as well as any chemical filtration. Use 5mL (1 capful) for every 40L (10 US gallons). Repeat this dose daily as required as long as fish show no stress.