Aquascape Praziquantel Treatment is the safest and most effective way to treat parasites in pond fish, like flukes, flatworms, and tapeworms. Symptoms like flashing/rubbing on rocks, red streaks in fins, and red/swollen gills can be quickly treated with a single Praziquantel dose - no water changes needed. It is vital to address parasite issues immediately and accurately dose any treatment, as poor water quality and stressed fish are often the cause.