The Water Wych does not need any device to make it work. However, if placed in a pond with a pump and existing filter, it will work even faster! Simply immerse the whole unit in the water and let the magic do it's work! To obtain the best results from your Water Wych the water in your pond or water feature should be always maintained at levels below pH 8.0.
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.