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This presentation was produced and is copyrighted by Stewart- Peterson®, Inc. 2003-2005.
Permission is granted for use by active AgEdNet.com® subscribers. All other use is prohibited.
STEWART-PETERSON and AGEDNET.COM are registered trademarks of Stewart-Peterson, Inc.
AC012 Combining
Aquaculture
with Hydroponics
Aquaculture Library
A natural pond setting …
• Fish, bacteria and plants all work together
to provide nutrients and dispose of waste.
• The ammonia/nitrogen cycle is key.
The ammonia/nitrogen cycle:
Nitrosomonas
Bacteria
Algae,
Plants
Fish Wastes,
Uneaten Feed
Nitrobacter
Bacteria
Ammonia (NH3)
Nitrate (NO3)
Nitrite (NO2)
Fish Feed
Here’s how it works …
• Fish live in their own bathroom.
• Fish waste is mostly ammonia.
• Excess feed also produces ammonia.
• Too much ammonia and all the fish are
dead.
Bacteria to the rescue …
• Certain bacteria LOVE ammonia.
• Nitrosomonas bacteria eat up the
ammonia and give off nitrite.
• But too much nitrite is also dangerous to
fish.
Now it’s more bacteria riding
to the rescue …
• Nitrobacter bacteria love nitrites.
• These bacteria give off nitrates as a waste
product.
• Once again, too many nitrates will kill the
fish.
Then it’s plants that step up
to the plate …
• The plants feed on the nitrates and grow
big and strong.
• Fish swim along and eat the plants,
releasing ammonia as waste and
• THE WHOLE CYCLE STARTS AGAIN!
What is aquaponics?
• A combination of aquaculture and
hydroponics
• Fish, plants and bacteria working together
to meet each others needs.
• Fish produce the ammonia
• Bacteria break down the ammonia to nitrates.
• Plants feed on the nitrates to produce fish
food.
Aquaponics is experimental:
• True recycling systems that reuse water
and nutrients
• No groundwater pollution
• No nutrient runoff
• Less than 1/10th the fertilizer and 1/100th
the water of traditional systems
• Outperforms traditional agriculture up to
30:1
More about aquaponics:
• It is a closed-loop
ecosystem.
• Combines growing
fish and plants
• A manmade version
of Mother Nature’s
pond, stream and
field ecosystem Photo courtesy K. Fitzsimmons.
A simple system:
• Fish in a fish tank
• Pump moves water from the tank through
a series of troughs on top of the tank
• Pots have plants in rockwool
• Fish wastes are trapped in the rockwool
and feed the plants
• Clean water flows from plants back to the
fish tank.
More elaborate systems:
• Systems to separate solid vs. dissolved
waste
• Automatic monitors, backup pumps
• Automatic fish feeding system
• System to maximize plant growth
Pretty great system, right?
• An aquaponic system is nearly a total
recycling program.
• Plants feed fish.
• Fish waste feeds
bacteria.
• Bacteria
feed plants.
• But fish grow,
so you need
to feed them.
Photo courtesy K. Fitzsimmons.
System requirements:
• Bacteria like temperatures of 75-80 F
• Bacteria are slow to adapt to changes, so
limit changes in feed volume.
• Too few fish? Fertilize the plants.
• In water – not approved for food grade fish
• Spray on the leaves (foliar)
• Don’t forget light for the plants.
• Avoid too much heat from the lights.
The ammonia/nitrate cycle
Nitrosomonas
Bacteria
Algae,
Plants
Fish Wastes,
Uneaten Feed
Nitrobacter
Bacteria
Ammonia (NH3)
Nitrate (NO3)
Nitrite (NO2)
Fish Feed
This presentation was produced and is copyrighted by Stewart- Peterson®, Inc. 2003-2005.
Permission is granted for use by active AgEdNet.com® subscribers. All other use is prohibited.
STEWART-PETERSON and AGEDNET.COM are registered trademarks of Stewart-Peterson, Inc.
www.agednet.com
800-236-7862

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Fish and Bacteria.ppt

  • 1. This presentation was produced and is copyrighted by Stewart- Peterson®, Inc. 2003-2005. Permission is granted for use by active AgEdNet.com® subscribers. All other use is prohibited. STEWART-PETERSON and AGEDNET.COM are registered trademarks of Stewart-Peterson, Inc. AC012 Combining Aquaculture with Hydroponics Aquaculture Library
  • 2. A natural pond setting … • Fish, bacteria and plants all work together to provide nutrients and dispose of waste. • The ammonia/nitrogen cycle is key.
  • 3. The ammonia/nitrogen cycle: Nitrosomonas Bacteria Algae, Plants Fish Wastes, Uneaten Feed Nitrobacter Bacteria Ammonia (NH3) Nitrate (NO3) Nitrite (NO2) Fish Feed
  • 4. Here’s how it works … • Fish live in their own bathroom. • Fish waste is mostly ammonia. • Excess feed also produces ammonia. • Too much ammonia and all the fish are dead.
  • 5. Bacteria to the rescue … • Certain bacteria LOVE ammonia. • Nitrosomonas bacteria eat up the ammonia and give off nitrite. • But too much nitrite is also dangerous to fish.
  • 6. Now it’s more bacteria riding to the rescue … • Nitrobacter bacteria love nitrites. • These bacteria give off nitrates as a waste product. • Once again, too many nitrates will kill the fish.
  • 7. Then it’s plants that step up to the plate … • The plants feed on the nitrates and grow big and strong. • Fish swim along and eat the plants, releasing ammonia as waste and • THE WHOLE CYCLE STARTS AGAIN!
  • 8. What is aquaponics? • A combination of aquaculture and hydroponics • Fish, plants and bacteria working together to meet each others needs. • Fish produce the ammonia • Bacteria break down the ammonia to nitrates. • Plants feed on the nitrates to produce fish food.
  • 9. Aquaponics is experimental: • True recycling systems that reuse water and nutrients • No groundwater pollution • No nutrient runoff • Less than 1/10th the fertilizer and 1/100th the water of traditional systems • Outperforms traditional agriculture up to 30:1
  • 10. More about aquaponics: • It is a closed-loop ecosystem. • Combines growing fish and plants • A manmade version of Mother Nature’s pond, stream and field ecosystem Photo courtesy K. Fitzsimmons.
  • 11. A simple system: • Fish in a fish tank • Pump moves water from the tank through a series of troughs on top of the tank • Pots have plants in rockwool • Fish wastes are trapped in the rockwool and feed the plants • Clean water flows from plants back to the fish tank.
  • 12. More elaborate systems: • Systems to separate solid vs. dissolved waste • Automatic monitors, backup pumps • Automatic fish feeding system • System to maximize plant growth
  • 13. Pretty great system, right? • An aquaponic system is nearly a total recycling program. • Plants feed fish. • Fish waste feeds bacteria. • Bacteria feed plants. • But fish grow, so you need to feed them. Photo courtesy K. Fitzsimmons.
  • 14. System requirements: • Bacteria like temperatures of 75-80 F • Bacteria are slow to adapt to changes, so limit changes in feed volume. • Too few fish? Fertilize the plants. • In water – not approved for food grade fish • Spray on the leaves (foliar) • Don’t forget light for the plants. • Avoid too much heat from the lights.
  • 15. The ammonia/nitrate cycle Nitrosomonas Bacteria Algae, Plants Fish Wastes, Uneaten Feed Nitrobacter Bacteria Ammonia (NH3) Nitrate (NO3) Nitrite (NO2) Fish Feed
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