These Sock Nets from Dream Pond are high quality and built to lasr for many years. This model has a 26'' long watertight sock and an 18'' long soft 1/8'' mesh taht allows water to pass through.
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.