Yes. All of our fish are quarantined and closely monitored prior to being listed for sale, and they are preventively treated using metronidazole, praziquantel, and tetracycline. Metronidazole is commonly used in aquariums to treat bacterial and protozoal infections, including some types of parasitic worms. Praziquantel is known to be effective against a wide range of parasites, including flatworms, flukes, and tapeworms. Tetracycline is used to treat a wide range of bacterial infections in fish, including fin rot, tail rot, popeye, and other infections.