Grow Fish Instead of Algae: Lake & Pond Stewardship

  • Provide secure and healthy habitat for fish, insects and birds
  • Limit algae and golden algae
  • Make water healthy again for human enjoyment
  • Boost the growth of periphyton to provide natural food for fish
  • Improve water clarity and shade out underwater weeds
  • Protect against the impacts of wave action

BioHaven Floating Islands restore lakes and ponds to a healthy, thriving state, increasing biodiversity and bringing back the value of lakeshore living. Mimicking nature’s own solution, BioHavens are beautiful and functional wetlands that cycle valuable but misplaced nutrients into beneficial biomass (plants and fish) instead of algae. The BioHaven StreamBed oxygenates and homogenizes water so that air-breathers can thrive in a comfortable temperature range. Specially-designed habitat islands provide safe havens for all manner of fish, aquatic species and nesting birds.

  • labelMultiple Functions
    • BioHaven Floating Islands can be grouped together or launched singly to add beauty and wetland function to any pond or lake
    • BioHavens can be customized to create any desired habitat
    • Islands can serve as a swimming platform or kayak dock
    • They can function as both Fish Aggregation Device and fishing platform
    • BioHavens protect shorelines from the wave impact of boating and other water sports
    • The BioHaven StreamBed combines the benefit of surface area with aeration
  • labelFeed Fish Instead of Algae

    Growing Fish Instead of Algae

    BioHaven Floating Islands provide “real estate” for the microscopic life forms that clean up water and resurrect the food web. As soon as a planted island is placed in a waterbody, biofilm starts to grow around and through it, reaching every fiber and crevice within the island.  As the plants and roots grow, they are also covered with biofilm, turning into a natural cleaning system. Water clarity improves. Nutrients are recycled into biofilm, which turns into food for fish that is constantly being harvested and renewed. The net result is less algae and more fish.


    Placement and Anchoring

    • BioHavens are ideal for recreational ponds, where they can be placed with or without anchors
    • In larger lakes, ideal placement is in a bay so that the island can be sheltered from winds and enjoyed from shore
    • In large, open waterbodies, an engineer’s report on anchor design will be required to assess the wind and wave impacts
    • The flexible island material has no hard edges and can easily be marked with reflector posts or discs to signal its presence to water users.
  • labelBenefits
    • BioHaven Floating Islands add riparian edge to ponds and lakes, providing secure habitats for birds, insects, frogs and other species under threat from human activities around water
    • BioHavens provide water quality benefits by harnessing natural processes, not chemicals, to re-cycle excess nutrients into more beneficial and productive life forms
    • BioHavens dampen the effects of damaging wave action, protecting shorelines from erosion and loss of sensitive lifeforms
    • They enhance fish productivity and provide a platform to catch them from
    • They improve water clarity and bring back the pleasure of lakeside living
  • labelCase Studies and Research
    • Nutrient removal and algae control project in an urban lake in China

      Yingri Lake, Jinan, China

      The purpose of this island was to eliminate summer algae blooms by reducing the nutrient loading in this urban lake. The results were an impressive reduction in carbon, Nitrate and Phosphorus which successfully stopped the algal bloom from happening.

    • From Phosphorus to Fish – stewarding Fish Fry Lake for optimum water quality enhancement

      Shepherd, Montana

      This is a report covering the first year where fish harvest was intentionally used as a means to remove phosphorus from the nutrient-rich water of Fish Fry Lake, in the agricultural area of Eastern Montana. Fish growth rates, as a result of the BioHaven substrate, were found to be well above average, and the pounds of phosphorus removed were carefully documented. The stewardship and measurement program described here is ongoing.


    • Chuck’s Pond – An Application Story

      Chuck’s pond wasn’t always the beautiful water feature it is today…. Read the story of successful garden center owner, Chuck Gainan, and how he went the long way round to achieving his goal…

BioHaven Floating Islands are teeming with life from diatoms and protozoa to dragonflies and damselfly nymphs.

Many young people catch their first fish from a BioHaven Floating Island – in this case, from a floating walkway.

Fathead minnows flourish within the stream channel of a BioHaven StreamBed, with plenty of periphyton to sustain them.

This beautiful island array, treating a public lake in Hangzhou, China, shows the multiple benefits of BioHaven.