Proven formula for external and internal parasitic infections. Paracidol FW is very effective against Koi Sleeping Syndrome and also against Argulus sp (fish lice), Lernea sp (anchor worm), gill flukes, white spot / ich, costia, hole-in-the-head disease and other parasitic infections. Paracidol FW strictly not to be used with invertebrates. Dosage : 10 ml / 100 litre Packing : 60 ml, 120 ml, 220 ml, 500 ml, 1 litre and 5 litre