Slagter

Hobby Brine shrimp hatchery!

  1. Slagter

    Slagter MASA Contributor

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    Slagter submitted a new Showcase Item:

    Hobby Brine shrimp hatchery!

    Read more about this showcase item here...
     
    Last edited by a moderator: 11 Mar 2016
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  3. Slagter

    Slagter Thread Starter MASA Contributor

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    Any ideas how it works ?
     
  4. Slagter

    Slagter Thread Starter MASA Contributor

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    Well, they just hatch. I recon if you put water in a small bowl at room temp they would hatch as well...

    The middle hole in the tub is where they collect once hatched. They are attracted to light and that is the only place where here is any light. It is an ingenious little thing that makes life very easy with absolutely no mess. It's brilliant!
     
  5. Annoying

    Annoying

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    WOW thats amazing wish this could have been in SA!
     
  6. Reef Maniac

    Reef Maniac MASA Contributor

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    Like any other living organism, artemia needs oxygen to live. Sure, some eggs will hatch in this contraption (like you said, they will hatch in a small bowl of water as well), but if you want a large amount of brine shrimp to hatch, and to stay alive for a day or two, you would be much better off using a plastic 2-liter cooldrink bottle (works well turned upside down...), with an airline bubbling in it.

    Hennie
     
  7. Slagter

    Slagter Thread Starter MASA Contributor

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    Well, the water surface area is quite large so there will be dissolved oxygen in the water. But it makes enough Brine Shrimp for every day feeding. Like I said, it's only a 1/4 Teaspoon of eggs. Apparently that is over 100 000 eggs per day. Besides, you don't really want to feed older brine shrimp. Their protein content diminishes the longer they are alive.
     
  8. Reef Maniac

    Reef Maniac MASA Contributor

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    Which will be used up pretty rapidly by a large number of artemia, and which would be replaced much slower because there is no water movement.

    Also, keep in mind that the waste generated by the artemia will be much more concentrated in such a small volume of water.

    I've bred lots of fish in my life, and have hatched hundreds of batches of artemia during this time. As you correctly noted, a 1/4 teaspoon of eggs (actually cysts) should result in a very large amount of baby shrimp larvae. On a good day, this amount of eggs would supply enough shrimp larvae for about a week of feedings (the trick is to freeze the larvae in ice cubes soon after they have hatched, then you can feed all week...). Looking at your photos, there is only a very small number of live larvae concentrated in that center scoop thingy. Most of the cysts did not hatch, and is visible in the outer rings. If for no other reason, it is pretty poor economics to kill (say) 90 000 larvae and only harvest 10 000, if the ratio could be reversed by just using a larger volume of water, and running a simple airline into the container.

    To nit-pick, it is true that their nutritional value (not protein content) diminishes the longer they are alive, but that is ONLY true if you don't feed them (they live off their egg-sacs for the first two days), and, I suppose, the same could be said for any of us... Feeding them phytoplankton and/or yeast products, or "soaking" them in HUFA (e.g. Selcon) will result in them regaining, or even increasing, their nutritional value.

    By the way, have you ever seen an adult brine shrimp. They grow to about 1cm in length, and make excellent live food for the larger fish - the trick is to grow them out in a large container, out doors, feeding them green water and doing partial water changes to reduce the level of water pollution.

    Hennie
     
  9. LuckyFish

    LuckyFish MASA Contributor

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    Goes for around 15 Euro in Germany.
    I agree with the post above.
     
  10. Slagter

    Slagter Thread Starter MASA Contributor

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    Fair enough...

    I had a look in the container this morning and it appeared as though 80% had hatched. I checked yesterday and that was about 24 hours after starting the thing. This morning there was a much bigger yield in the hatchery. I started feeding these to the fish. While it does take time for the BBS to move to the center of the device, I managed to get more than enough to feed the fish in the 8 tanks I am running.

    While I understand, and appreciate your opinion Reef Maniac, I do think this thing makes a good batch of BBS without the mess of 2 liter coke bottles. I could start a green water culture and hatch the brine shrimp this way and then transfer them into a bigger container/tank after they are hatched and raise them that way. Just need to start a green water culture.

    Any tips on how to go about this? I assume you take water, and leave it in the sun? Add a leaf or 2?
     
  11. Steve Warren

    Steve Warren

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    Hi Slagter
    Generally nhbs that have come from decapsulated cysts are far more nutritious, and you will have a better hatch rate in a much shorter time.
    Decapsulating of brine shrimp eggs - Marine Aquariums of South Africa
    In my opinion in far less of a footprint than your hatcher takes up. My son puts his in a hatcher (rain gauge type) in the sump and hatching has already started in 8 hours on some occasions.

    Phytoplankton is generally grown as a specific species, usually nanochloropsis (hope the spelling is right) in SA but also other species overseas. To get a culture you need to get a starter culture off someone who has one. It involves a lot of work to culture correctly.
    Practical growing of phytoplankton - Marine Aquariums of South Africa

    The artemia could just be cultured in any greenwater in a tub as Reef Maniac said.
    If your container was as efficient as you think it is Luckyfish and Reef Maniac and my son would be using them (and I have one, somewhere in the pile of unused equipment somewhere in the cupboard).
     
    Last edited: 15 Feb 2010
  12. viper357

    viper357 Admin MASA Contributor

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    Ok, fair enough that this gadget is not 100% ideal and lacks a few of the accepted norms associated with brine shrimp batching, but I have to say it is a rather novel idea, it's simplicity and ease of use looks great, for someone like me that just wants to feed some live shrimp to my 4ft tank once or twice a week I reckon this little gadget is perfect, even if I only get a 10% hatch rate. I honestly can't be bothered with all the other peripherals of setting up airlines and focusing lights etc. Life is too busy and I need things simplified :p I like this little gadget and I think I might get myself one.:)
     
  13. mandarinman

    mandarinman

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    well let me tell you!!!!!lol that for a lazy person like myself who would like a small amount of brineshrimp daily this is ideal. good onyou for finding and trying it out!
     
  14. Steve Warren

    Steve Warren

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    No harm in trying as you say, putting a rain gauge in the sump with water from your tank takes up less space and keeps it at the right temperature. Connecting an airline from a pump is quick and easy. Decapsulating improves the hatch rate, nutritional value and sterilises.

    I found my tray, maybe I will try it, but if someone in PE is interested I am sure they can buy it or swap something with Rogan for it. The white bit in the centre is missing.
     
  15. Slagter

    Slagter Thread Starter MASA Contributor

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    I can promise you guys now it's not a 10% hatch rate. It's closer to 80% hatch rate. But like i said, it's nice and easy. I'm going to keep running one of these dishes and I will look into the idea of the rain gauge in the sump, once my tank arrives (hopefully this week).

    Anyway, I though it a useful thing for someone who has only ever managed to hatch brine shrimp once in a 2 liter coke bottle...
     
  16. Warr7207

    Warr7207

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    interesting product, although i can't quite figure how it works.

    thought you had 8 tanks ?
     
  17. clinton stanford

    clinton stanford

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    interesting...thats quite cool actualy;)
     
  18. crispin

    crispin

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    can u pm me where you got it from I wouldnt mind trying one for fun:)
     
  19. Slagter

    Slagter Thread Starter MASA Contributor

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    I have way more than that... But I decided to go for a bigger system than I originally intended.

    I'm selling off a whole bunch of tanks and stuff.

    @ Crispin - PM on the way.
     
  20. oliver

    oliver

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    I guase I am lucky in that way I just go to the salt pans near me and collect when I need
     
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