High Performance! Pond Fizz Tabs Parasite Treatment with praziquantel removes external and internal parasites from fish including flukes, internal worms, lice, anchor worms and flagellates such as hexamita or spironucleus associated with hole-in-the-head disease. Special ingredients have been added to protect fish from secondary infections. And, with the added benefits of allantoin, fish experience the soothing effects of this natural protectant as it helps heal. Boosted with Praziquantel and Allantoin Clears Internal and External Parasites Fast Protects Against Secondary Infections One Tablet for Every 50 Gallons Contains 20 Tablets In Stock-Ships Fast