PraziPond Plus Praziquantel and PraziPro Praziquantel are the preeminent treatment for flukes, lice and anchor worms. Praziquantel is by far the most gentle, yet effective treatment for available to our hobby.
Summer usually means increased pond water loss due to evaporation, which of course leads to topping off our ponds more. You should always add dechlorinator when topping off the water level of a pond. Any amount of chlorine (such as that found in treated water) can be harmful to your fish. Even if it is not enough chlorine to mean immediate death of the fish, this chlorine can still cause harm to proper gill function.