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Eisenia Hortensis in Aquaponics

Discussion in 'General Aquaponics discussion - Aquaponics system ' started by seanxwarp, Jun 5, 2016.

  1. seanxwarp

    seanxwarp New Member

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    I have a 9 week old outdoor aquaponics system that has 3 media grow beds, a sump, and a goldfish tank that has 4 air stones for aeration. Each grow bed is on constant flood. Last week, I added 10 European Nightcrawlers to each growbed. Today, I found most of them dead near the drain pipe or in the sump tank. Since they thrived in my compost bin, I thought they would survive like eisenia fetida. Why did they die? I thought compost worms could survive in oxygenated water. There is currently a mild algae bloom that happened about 2 weeks ago
     
  2. Ringer

    Ringer Active Member

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    Hi Seanxwrap,
    Assuming your waters healthy and not too warm I'd guess they drowned.
    Worms will survive flood drain but I think they'll drown in constant flood environments.
    Cheers
     
  3. Murray

    Murray Site Admin Staff Member

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    Flood and drain makes the bed oxygen rich so worms survive well. "Constant flood" can be lots of things. Exactly how do you have it set up?
     
  4. seanxwarp

    seanxwarp New Member

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    Basically, my system is CHIFT PIST. I have the fish tank overflow water through a pipe that flows to the 3 growbeds. Each growbed is only 5 inches that's planted with lettuce. The stand pipe drains the water at 3.5 inches to a sump tank that pumps water to the fish tank. So the water level in the growbeds are at a constant 3.5 inches
     
  5. Murray

    Murray Site Admin Staff Member

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    Yep, sorry to tell you that you are up-against-it trying to do it that way. It is well documented and well tested in literally tens of thousands of home systems that 300mm deep (1 foot) deep media grow beds using a flood and drain methodology either by syphons or timers ....works.
     
  6. David Appleby

    David Appleby New Member

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    Murry. I use a timer on my system. At the moment it is set to 1 hour on 1 hour off and the plants and fish are doing very well. But what would be the ideal cycle time?
     
  7. Murray

    Murray Site Admin Staff Member

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    That should work David, although should not need an hour to fill the grow bed. The time should be such that the bed/s get flooded, switch off....the beds drain, switch on again.
     
  8. David Appleby

    David Appleby New Member

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    Cheers for that. Will have a play with during the week and see what i come up with.
     
  9. seanxwarp

    seanxwarp New Member

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    After reading your response, I added a 1.5 ft growbed that's filled with about enough scoria to be at 300 mm mark. I set the standpipe to drain at 10.5 inches. If I were to add the same worm species into this growbed, could they possibly survive since they have some space without water?
     
  10. Murray

    Murray Site Admin Staff Member

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    Hi Sean,
    The worms will be just fine.
     

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