NT Labs Argusol contains the active ingredient Diflubenzuron which is highly effective in the treatment of fish lice (Argulus), anchor worm (Lernaea) and other crustacean parasites.When to use:When fish have large external parasites, Argusol is an easy-to-use suspension of diflubenzuron, a powerful anti- crustacean medication.How to use:- Test your water quality.- Shake the bottle well before use. Mix the appropriate dosage in a bucket of clean pond water, pour evenly over the surface of the pond and leave for 7 days.- Switch off UV filtration for 10 days from adding the medication. Aerate the pond well during treatment.- If you feel a repeat dose is necessary, check your diagnosis carefully using the Diagnosis Tool; a different medication may be more suitable. Allow 7 days after medicating and perform a partial water change before re- treating or treating with another medication.- Always treat when you have time to observe fish and take appropriate action in the unlikely event of a bad reaction.Active Ingredients: Diflubenzuron 291.2mg/100ml Warning:- Do not use at water temperatures below 10°C or above 30°C. Do not use in hot, humid or thundery weather.- Do not mix with other medications.