Evolution Aqua Varipump

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Evolution Aqua Varipump Range

Variable Speed Pond Pumps for Koi and High Performance Filtration Systems

The Evolution Aqua Varipump range provides adjustable, high output circulation for koi ponds and advanced filtration systems. Designed for installations where accurate flow control is essential, these pumps allow you to match water movement precisely to your filter capacity, pipework layout and head height.

Unlike fixed speed pond pumps, the Varipump gives you full control over performance. Flow can be increased or reduced directly from the digital controller, allowing proper tuning of dwell time inside moving bed filters, bead filters and UV clarifiers. As a result, mechanical capture improves and biological conversion remains stable.

Available in 10,000, 20,000 and 30,000 litres per hour models, the Varipump range covers medium to large koi pond systems, including Nexus 220+ and Nexus 320+ installations.

Because the pump can operate either submerged or dry mounted inline, it suits both pump fed and gravity fed filter bays.

Precise Flow Control for Stable Filtration

Maintaining correct turnover is critical in koi ponds.

  • Too much flow reduces contact time inside the filter.
  • Too little flow reduces oxygenation and overall turnover.

The Varipump solves this problem by allowing adjustable output and real time wattage monitoring. This means you can fine tune the system properly rather than guessing.

For larger installations with multiple returns or higher head pressure, this flexibility becomes even more important.

Designed for Serious Koi Installations

The Varipump range is commonly used in:

  • Nexus filter systems
  • Bead filter installations
  • Drum and moving bed setups
  • Multi bottom drain ponds
  • Large UV systems
  • High volume pond builds

The six pole, three phase motor design delivers strong torque and stable performance under load, making it suitable for demanding filtration layouts.

Why Buy Your Varipump From Us?

All authorised Evolution Aqua dealers sell at the same retail price. However, the difference lies in knowledge, support and real world installation experience.

When you purchase from us:

  • You receive advice from a specialist koi pond installation company
  • We match the pump correctly to your filtration system
  • We advise on flow rate setup for Nexus and bead filters
  • We help calculate realistic turnover rates
  • We provide after sales support based on real installations

We install these pumps ourselves in full pond builds across Kent and the South East. Therefore, recommendations are based on experience, not just catalogue specifications.

Choosing the correct pump is one of the most important decisions in any filtration system. Getting it wrong can reduce filter performance, increase maintenance and raise running costs.

Getting it right ensures stable water quality and long term reliability.

If you are unsure which Varipump model suits your pond, we are happy to advise.

Evolution Aqua Varipump Pond Pump – Frequently Asked Questions

Below you will find detailed answers to common questions about the Evolution Aqua Varipump range, including installation guidance, compatibility, energy efficiency and pump sizing advice for koi ponds and advanced filtration systems.

1. What is the Evolution Aqua Varipump and how does it work?

The Evolution Aqua Varipump is a variable speed pond pump designed for koi ponds, gravity fed systems and advanced filtration setups.

Unlike fixed flow pond pumps, the Varipump allows you to electronically adjust the flow rate using the supplied digital controller. This means you can fine tune circulation to match:

  • Pond volume
  • Pipework size and head height
  • Filter requirements
  • Seasonal flow adjustments

Because the pump speed is adjustable, you control both performance and energy consumption rather than running at maximum output continuously.

2. What sizes are available in the Evolution Aqua Varipump range?

The Varipump is available in three main flow capacities:

  • Varipump 10,000 LPH
  • Varipump 20,000 LPH
  • Varipump 30,000 LPH

Each model is suitable for progressively larger ponds and higher flow filtration systems such as:

  • Nexus 220+ and 320+
  • Bead filters
  • Drum filters
  • Moving bed filters
  • Large koi pond circulation systems

Choosing the correct size depends on your pond turnover requirements and pipework design.

3. What makes the Varipump different from a standard pond pump?

The key difference is controllability.

A standard pond pump runs at one fixed speed. The Varipump allows you to:

  • Increase or reduce flow rate instantly
  • Monitor wattage consumption
  • Match exact filtration dwell time
  • Reduce energy usage during winter

This makes it ideal for serious koi keepers who want precise control over pond turnover and filtration efficiency.

4. Can the Evolution Aqua Varipump be used in both pump fed and gravity fed systems?

Yes. The Varipump is suitable for both pump fed and gravity fed installations.

It works particularly well in:

  • Nexus filtration systems
  • Bead filters
  • Drum filter setups
  • Multi chamber systems
  • Return circuits from gravity fed filter bays

Because flow is adjustable, it helps balance gravity systems where correct dwell time is critical.

5. Is the Varipump energy efficient?

Yes, and this is one of its main advantages.

Since you can reduce the flow output, the pump does not need to run at full power constantly. Lower flow equals lower wattage consumption.

This results in:

  • Reduced electricity costs
  • Lower annual running expenses
  • Less heat generation
  • Longer motor lifespan

For larger koi ponds running 24 hours per day, energy efficiency becomes a major long term saving.

6. What type of motor does the Varipump use?

The Evolution Aqua Varipump uses a six pole, three phase motor design.

This provides:

  • Smooth operation
  • Reliable torque
  • Strong head height performance
  • Reduced vibration
  • Long term durability

It is engineered for continuous duty operation in demanding pond environments.

7. Can the Varipump handle solids?

Yes. The Varipump is designed as a filtration pump and can handle suspended solids typically found in koi ponds.

However, in gravity fed systems, solids should already be pre filtered via bottom drains and mechanical filtration before reaching the pump.

In pump fed systems, correct pre filtration will extend pump lifespan and improve performance.

8. How do I choose the correct Varipump model for my pond?

The correct model depends on:

  • Total pond volume
  • Desired turnover rate
  • Filter type
  • Head height
  • Pipe diameter

As a general guide:

  • Varipump 10,000 suits Nexus 220+ systems and medium koi ponds
  • Varipump 20,000 suits Nexus 320+ and mid sized bead or drum systems
  • Varipump 30,000 suits large koi ponds, bead filters and high turnover systems

Correct pump matching ensures efficient mechanical and biological filtration performance.

9. Can the Varipump be installed dry mounted outside the pond?

Yes.

The Varipump can be used:

  • Submerged in the pond
  • Installed externally in a dry mount configuration

This flexibility allows it to integrate into filter bays and professional installations with ease.

10. Does the Varipump include a controller?

Yes.

Each Varipump includes a digital controller that allows:

  • Flow adjustment
  • Wattage monitoring
  • Performance tuning

This gives pond keepers complete control over circulation and energy consumption.

11. Is the Evolution Aqua Varipump suitable for koi ponds?

Absolutely.

The Varipump range was developed specifically for koi pond filtration systems. It provides:

  • Stable flow rates
  • Adjustable circulation
  • Reliable long term operation
  • Compatibility with Nexus and bead filters

For serious koi keepers, adjustable flow is essential for maintaining biological stability and proper dwell time.

12. How long does the Varipump last?

With correct installation and maintenance, the Evolution Aqua Varipump is built for long term continuous use.

The robust motor design and adjustable output reduce strain compared to fixed speed pumps, which can help extend operational lifespan.

The pump is supplied with a manufacturer warranty for additional peace of mind.

13. Can I reduce flow during winter?

Yes, and this is one of the biggest advantages of a variable speed pond pump.

During colder months when feeding reduces and biological demand lowers, you can decrease circulation speed. This:

  • Reduces energy costs
  • Maintains stable winter conditions
  • Prevents excessive cooling
  • Keeps sufficient turnover without overworking the system

14. Why buy the Evolution Aqua Varipump from us?

We specialise in koi pond filtration systems and match pumps correctly to Nexus, bead and drum filters.

When you purchase from us, you benefit from:

  • Correct sizing advice
  • Real world installation experience
  • Ongoing support
  • Genuine Evolution Aqua products
  • Fast and secure delivery

If you are unsure which Varipump model suits your pond, we are happy to help.