Details: Wait 48 hours between treatments. Remove activated carbon. Change 25% of the water before each new treatment. For anchor worms, repeat treatment up to three times, once a week, for three weeks. For fish lice, treat once a week for three to five weeks. DO NOT OVERDOSE. Active ingredients: praziquantel; N-[[(N-Chlorophenyl)amino]carbon 1]-2,6-difluorobenzamide; metronidazole; acriflavine.