At Swell UK, we offer a range of reef pumps for marine tanks, designed to circulate water from the sump to the tank to maintain filtration and oxygenation. Our selection features reliable AC models and controllable DC units from trusted brands, perfect for every tank, from nano reef aquariums to large marine systems.
Return Pumps
Help and advice on shopping for: Return Pumps
How to choose the right pump
Choosing your marine aquarium pump depends on factors such as aquarium size, sump setup, and your desired flow rate. As a guide, we recommend your pump should circulate your total system volume 5-10 times per hour.
For example:
- 200L aquarium: approx. 2,000 lph pump
- 500L aquarium: approx. 5,000 lph pump
The head height and pipework will reduce the actual flow, so it's best to choose a slightly more powerful or controllable model.
Do I need an AC or DC return pump?
AC pumps are reliable, fixed-speed pumps best used in a standard aquarium system, whereas DC pumps offer adjustable flow control, quieter operation, and improved energy efficiency, making them a popular choice with hobbyists.
What's the difference between return pumps and wavemakers?
Pumps move water between your sump and aquarium, while wavemakers create water movement inside the tank, typically used for coral health and circulation. Most marine setups require both.
Looking for a wavemaker? Shop our range today.
Why choose Swell UK?
At Swell UK we provide:
- Lowest price guarantee: Shop leading brands for less (see T&Cs)
- Next day delivery: Fast and reliable shipping straight to your door
- Wide range of reef equipment and essentials from trusted brands
- Expert advice from experienced aquatics specialists
Frequently Asked Questions
What is a return pump?
These sump pumps are used to move water from a sump into the main display tank. They are essential for most filtration systems in marine aquariums, helping to maintain circulation and oxygenation.
What return pump do I need?
We recommend choosing a DC pump if your system requires adjustable flow. AC pumps are fixed-speed, ideal for setups where the pre-set flow rate is suitable and would never need to be changed.
What size return pump do I need?
The best model for your aquarium depends on the total system volume, sump setup, and desired flow rate. Most saltwater systems require a pump capable of circulating the full volume 5-10 times per hour.