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Garden pumps

This term includes a wide range of pumps for water supply, irrigation or pumping water from tanks. Self-priming or submersible, depending on the use, portable and stationary, used for pumping clean or sludge water.

Water reservoirs require the movement of water to ensure the recirculation and aeration that are needed for a healthy environment in the water. This can be ensured by installing a pump or filter. The pumps help keep the water in your pond clean and thus help distribute nutrients evenly to fish, plants and other aquatic organisms. Constantly flowing water also reduces the risk of mosquitoes on the water surface, and helps fight the formation of algae and even distribution of oxygen at all depths of the water. Garden pumps can also be used for fountains.


There are different variants of garden pumps - magnetic or electric submersible pumps. Each has benefits for specific applications. It's advised to carefully evaluate which variant is optimal for your garden before you make a purchase. A pump for pond circulation will have different requirements than a pump for a fountain. The calculation of the size / power largely depends on the size of the pond, but also if you use it only for circulation or even for water filtration. Another thing to consider is the amount of fish or plants in the pond as it increases the demand on your filter pump.


Submersible pumps are designed, as the term suggests, to be completely submerged in the deepest part of your pond. Their main benefit is easy installation. Submersible pumps do not need to be covered to blend in with nature and therefore do not disturb the character of the landscape. Another obvious advantage is their quiet operation, so they will definitely not disturb you when meditating in your garden. Some submersible pumps use oil for their operation - which should be avoided in the case of a "living pond".

  • Submersible pumps can be used to drain the pond before cleaning.
  • Place your pump directly in the pond
  • They pump 200-20,000 liters per hour
  • They are generally more economical and cheaper for smaller ponds



External pumps are a reliable, affordable and economical variant of water circulation solutions in your pond. They can pump large amounts of water and are often less expensive than submersible pumps. The downside is more complicated equipment installation and noisier operation, but both are generally compensated for higher reliability. It is important to know if the pump is self-priming or if it pumps its own water. For pumps that are not self-priming, a check valve must be installed to prevent damage to the motor when switched off and on again quickly.

  • External pumps can be noisy and can disturb the peace of your garden
  • They are suitable for large ponds
  • Should be Installed near the water source in a dry place
  • Require less routine maintenance than submersible pumps


In magnetic drive pumps an electric charge creates a magnetic field that causes the wheel to rotate, driving water pumping. Magnetic drive pumps are completely closed and do not require lubrication. Due to the fact that they do not contain oil, they are suitable for fish ponds - in case of a leak. This type of pump is not able to pump water vertically, so it is not suitable for fountains.

  • Highly efficient operation, cost saving
  • Works best in clean ponds without mud
  • Requires cleaning of the impeller to prolong its life
  • It has no seal



Electric drive pumps have a closed motor, powered by electricity. These pumps are able to achieve great upthrust and are therefore suitable for pumping to heights (so use them in your garden in the form of waterfalls or fountains). We recommend using pumps that do not have oil that could kill the fish in your pond in the event of a leak. However, many newer pumps have alternative lubrication with oil that is safe for fish.

  • Typically more expensive operation
  • Water "pushes" rather than "pulls"
  • Hard to fix for the average user


Choosing the right pump size will ensure proper water circulation in the pond. The pump should only be slightly oversized, as a direct ratio applies - the larger the pump, the more expensive. If the pump does not already have a pump head installed, it is necessary to calculate how much water the pump is able to pump before you buy it.

One of the rules is that the pump should be able to pump half the volume of the pond every hour. Of course, this rule only applies to smaller garden ponds. In order to choose the right pump, several calculations need to be made:


Flow for filtration
Flow in liters = 0.5 x pond volume (in liters)

Flow for fountains
For every 3 centimeters of the fountain at the top, you will need a pump capacity of 400 l

Flow for waterfalls

Small waterfall = 100l X width of the waterfall in cm

Medium waterfall = 200l X width of the waterfall in cm

Large waterfall = 400l X width of the waterfall in cm

Pond volume

Pond volume = 3.14 x pond radius x pond radius x average pond depth