Ponds are usually found outdoors, exposed to the elements, so it is almost impossible to stop insects, leaves, dust, dirt and other unwanted stuff from getting in them without some sort of coverage or barrier. If you leave a pond unprotected, you leave it at high risk of being exposed to foreign matter that can be harmful to the fish and plants living in it.
What you need to do is use the Pondnets 12ft x 15ft Premium Pond Net from Pet Store
. You can use this net to cover an entire pond
so it can be protected from most undesired materials that can get in otherwise. Also, it can protect the pond from predators that can dive into the water and prey on the fish and plants. The reverse works, too -- the net protects the fish from jumping out. Having a protective net covering also means that pumps don't get easily clogged and different kinds of filter media don't get easily exhausted.
The Pondnets 12ft x 15ft Premium Pond Net is made of black netting that is almost inconspicuous and almost invisible when laid out over the pond. Thus, it doesn't deter from the beauty of the pond, as some colored nets may.
Premium Pond Net1/8" opening, medium weight, Standard Netting