Aquarium Pumps
Submersible pumps with adjustable flow rate for aquariums, ponds, and small fountains: low-noise, low-consumption models and selection recommendations.
Products (1)
Brands: Cacheng
What is an aquarium pump used for?
Aquarium pumps are used to send aquarium water to the filter system, create water circulation, transfer water during sand and substrate cleaning, or circulate water in small fountain and pond setups. Continuous water movement improves oxygen distribution and increases the amount of debris reaching the filter, helping the water stay clearer. These pumps are designed to operate quietly and to run for extended periods at low energy consumption.
Selection tips
- Flow rate (L/h): Should be selected based on the aquarium volume and the flow recommended by the filter system.
- Flow rate adjustment: Adjustable models make it easier to achieve the right flow for the fish species and aquarium layout.
- Head: If an external filter or overhead filter is used, the height the water needs to rise must be taken into account.
- Mounting type: Suction-cup or foot-mounted holders make it easier to secure the pump.
The adjustable submersible pump in this category is specified as suitable for use in small ponds as well as aquariums.
Use and maintenance
The pump must operate fully submerged in water; running it in air will damage the motor. Regularly cleaning the sponge or pre-filter on the intake grille prevents flow rate from dropping. Calcium and sediment buildup inside the pump can cause noise around the rotor; periodic cleaning keeps the pump running quietly. Leaving a "drip loop" in the power cable before the outlet prevents water from travelling along the cable to the socket.
Frequently asked questions
How many liters per hour does an aquarium pump need to deliver?
This depends on the aquarium volume and the filter system being used. Consider both the filter manufacturer's recommendation and your fish's preferred current.
Why is the pump making noise?
Dirt around the rotor or the pump touching the glass can cause noise. Clean the pump and check the holders.
Can it be used in a saltwater aquarium?
Models specified as suitable for saltwater should be preferred; check the product description.
What do you recommend for larger ponds?
For high-flow and waterfall applications, browse the ornamental pond pumps category.
How often should the pump be cleaned?
Cleaning frequency depends on how quickly the aquarium gets dirty; a noticeable drop in flow rate is a good indicator that it is time to clean the pump and its sponge.
Can the pump harm the fish?
The intake grille and the sponge placed in front of it prevent small fish from being drawn into the pump. For fish sensitive to current, the flow rate should be kept low.