When setting up your aquarium, selecting the correct aquarium filter and fish tank pump is crucial for maintaining clean, healthy water and ensuring the wellbeing of your fish. To make the right choice, consider the following:

  • The most suitable filtration system for your aquarium type

  • The required flow rate based on your fish and tank setup

  • Any additional equipment such as UV sterilisers or protein skimmers

  • The type of plumbing setup in your aquarium system

1. Calculate Your Aquarium’s Water Volume

Accurate volume calculation is the first step when choosing an aquarium filter. Use this simple formula to work out the tank capacity in litres:

Length × Width × Height ÷ 1000 = Tank Volume (litres)

Example:
A fish tank measuring 150 cm (L) × 55 cm (W) × 55 cm (H):
150 × 55 × 55 ÷ 1000 = 453.75 litres

For a healthy tropical aquarium, it’s best if the entire water volume passes through the filter four times per hour:

453.75 × 4 = 1,815 litres per hour (LPH)
This means your aquarium filter should have a minimum flow rate of 1,815 LPH.

2. Choose the Best Aquarium Filter for Your Setup

There are several types of fish tank filters available, each suited to different aquarium sizes and setups:

  • Hospital or Breeding Tanks
    Use sponge filters or air-powered filters. These are ideal for delicate fish and fry as they prevent suction injuries and reduce water agitation.

  • Small Aquariums (under 30 gallons / approx. 113 litres)
    Internal filters or power filters are recommended.
    The AllPondSolutions 700IF+ Internal Filter – fully submersible with directional water flow, venturi aeration, and UV sterilisation to control bacteria and algae.

  • Large Aquariums (over 30 gallons / 113 litres)
    Use external canister filters or wet/dry filters. These provide higher flow rates and more media capacity.
    The AllPondSolutions  2000EF+ External Filter – features three filter media trays, UV steriliser, easy priming, and a spray bar for even flow distribution.

3. Determine the Ideal Flow Rate for Your Fish Tank Pump

Different fish species and tank environments require varying levels of water movement:

  • Marine aquariums and fast-swimming fish need strong flow

  • Planted aquariums and calm water species prefer gentle circulation

Research the preferred flow rate of your tank’s inhabitants to choose the best fish tank pump for your setup.

4. Consider Your Aquarium Plumbing

Whether you're using a basic system or a more complex one with a sump or external equipment, the distance water must travel impacts the pump's effectiveness. The longer the distance or the more vertical lift involved, the stronger the aquarium pump will need to be.

5. Account for Additional Aquarium Equipment

Many fish tank setups also include equipment such as:

These all require water flow, so your aquarium pump must support the total flow requirement, not just that of the main filter.

Final Advice for UK Aquarium Owners

Proper fish tank filtration is essential for any successful aquarium setup. Always research your specific tank requirements, and select equipment that matches your livestock and layout.

Need expert advice? Contact us – we’re here to help you choose the best aquarium filters and fish tank pumps for your needs.