Blue Planet Paracide controls external fish parasites such as Anchor Worm (lernea sp.), Skin &; Gill Flukes (Dactylogyrids and gyrodactylids) and Fish Lice (argulus sp.) in fresh and saltwater aquariums.This does not aid in the treatment of bacterial and viral infections.Directions for use:Remove from aquaria and wait 5 days after last treatment before returning to aquaria.Dose rate:Predissolve tablets in a disposable cup before addition to the aquarium water.Note:A small residue of cellulose will be evident after dissolving tablets. this is harmless to the fishUsage Guide:To calculate tank capacity:Length X width X water height (in cm) and divide by 1000 for litres.Use at the rate of 1 tablet per 40 litres of aquarium water. Keep water temperature below 27 degrees C.Maintain normal filtration and aeration. Repeat treatment after 7 days to prevent re-infestation.Trichlorfon breaks down in the water making it unnecessary to change the water between or after treatments.EACH TABLET CONTAINS:TRICHLORFON 20mg(an anticholinesterase compound)NOT TO BE USED on fish intended for human consuption.DO NOT Overdose.DO NOT Treat marine invertebrates (shellfish and anemones).