water features banner


The Simplest, Effective Pond Filtration System

Every year new filtration systems are introduced into the market, leaving the consumer with an overwhelming plethora of possibilities. How to choose? Since maintenance is the number one concern of nearly every pond owner, everyone wants a filtration system that requires the least amount of care but which gives clear water. The filtration system must also be adequate for the pond it filtering and ideally, it will not be prohibitively expensive to buy or to run.

There isn’t space here to go over the many varieties of filtration systems so instead we’ll focus on the simplest system that is at the same time, among the most efficient and easiest to maintenance. It is also one you can make yourself.


Buy a slightly oversized pump and bury it in gravel with several inches, say six or more, over the top. Have a perforated pipe running into the pump with a few large holes and bury this too, beneath several inches of gravel. Run the end of your outflow line into a reservoir that is also filled with gravel so that the water is pumped up, through the gravel and flows out the top  and back into the pond.


The water flowing through the gravel will cause the colonization of beneficial bacteria which transform the ammonia and nitrites into nitrates. If there is a lot of leaf fall you may also want to install a skimmer with it’s own small pump. If you do use a skimmer, use the horizontal type which do a better job of  collecting debris.


In addition, use floating plants, such as water hyacinths and plants with floating leaves, such as water lilies to cover some of the water surface, further reducing algae growth, and use submersibles, such as Anacharis which will use up the nitrates which would otherwise feed the unwanted algae.

Print This Page