Pond Vacuums and Vacuuming your pond occasionally will greatly improve water quality and clarity. No matter what you have for a filtration system some solid debris will end up on the bottom and should be removed. Decaying solids put an extra strain on your biological system, provide perfect conditions for the growth of harmful bacteria, consume oxygen and are unsitely. Removing them is simple using a vacuum that is engineered for vacuuming ponds.
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.