• Dissel 4, 1671 NG Medemblik, Nederland
  • +31 227 570 020


ISO 9001:2008

Number #1

Fish Protection

Leading Provider

Of hydro-power

Please be patient,
our site is under construction.

Our new website is up and running, but we are
still in the process of getting everything translated.
Please contact us if you have any questions.


New development: robust
and efficient free flow turbine

This revolutionary hydro power turbine is renowned for its
sublime kWh to investment cost ratio. Cavitation free,
fish friendly, low-maintenance and highly durable.


Protect fish in lakes and rivers

With the fish friendly products of FishFlow Innovations you will invest in
highly efficient systems that prevent unwanted fish mortality.


Interested in a FishFlow Innovation
on your location?

Our products are custom made in Holland
and we ship worldwide.

FishFlow Innovations develops and builds innovative fish migration facilities and protection systems. Our mission is to contribute to solve migration barriers for fish and prevent damage to fish through our tailor-made products. Get a quotation.


Fish Friendly Screw Pump

The 100% fish friendly water pumping solution from 0,8m Ø up to 5m Ø. Pumps up to 10 m³ per second.


Siphon Fish Ladder

Makes weirs, dams, sluices and other objects passable for migrating fish.


Free Flow Turbine

The most robust free flow turbine in the world.


Fish Friendly Screw Turbine

Usable for generating energy and for pumping water. 100% fish friendly.

Stroboscoop viswering

Strobe Light Fish Deterrence

Keeps fish away from pumping stations, cooling water intakes and hydro power stations.


Eel ladder

This modified siphon fish ladder facilitates migration of eel in areas where migration of other fish species is unwanted.


Low Pressure Turbine

This low pressure turbine, developed in cooperation with Pentair Fairbanks Nijhuis, is a fish friendly hydro power station.


Fish Friendly Axial Pump

This axial pump, developed in cooperation with Pentair Fairbanks Nijhuis, enables fish to migrate through pumping stations.



The airlift is an effective and efficient device for mixing water and thereby controlling blue-green algae.


Silent Bowthruster

This patented thruster generates no cavitation, is superbly quiet and highly efficient.


Curious how FishFlow Innovations
helps building
a sustainable future?

See our story

FishFlow Innovations develops and builds innovative fish migration facilities and protection systems. Our mission is to contribute to solve migration barriers for fish and prevent damage to fish through our tailor-made products.
All our products have been developed with particular attention for the natural preference and behaviour of fish. This results in facilities that are eagerly utilised by fish and enable their passage without injury or mortality.
With 8 active patents and more than 70 realized projects in 5 countries we are building a future where the wellbeing of aquatic ecosystems and the generation of renewable energy is evident.
Should you have a question regarding the protection of marine ecosystems or our hydroelectric systems? Feel free to contact us!

What customers say about FishFlow Innovations

FishFlow Innovations has a practical no-nonsense focus and expert knowledge.

Peter Paul Schollema

The concept is brilliant in its simplicity, which results in a reliable product.

Stany Vanremoortele

Our working relationship is great and the feedback from our UK customers is excellent.

Martin van Nieuwenhuyzen

FishFlow Innovations is a pleasant business partner. Craftsmanship is in their genes.

Pier Schaper

“ Our strength is the unique combination of knowledge of engineering, great insight in water flows and behavior of fish.


Gerard Manshanden

Managing Director

Niels Manshanden

Operational director


We are always interested in new projects, big or small. Please do contact us for specific questions or projects. We like to hear from you!

If you would like to contact us with a question or service request, call us on +31 227 570 020 or you can send us an e-mail. For other ways to contact us have a look on our contact page.

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