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Thread: Photo request - hatching jar

  1. #1
    TAS Guest TasV's Avatar
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    Photo request - hatching jar

    Can I ask for some one to post photos of their hatching jars? I hadn't thought about using hatching jars so have never looked at them. I was looking at a fishroom video today that looked like their hatching jars had sponge cut to fit the bottom and slid over pvc riser with holes drilled in the base with an airline run down through the middle of it so the whole thing was a airlift sponge filter. The outlet went out through the lid of the jar by the look of it.

  2. #2
    Here's a vid from 'Angels Plus' http://www.angelsplus.com/ they sell them.....

    Jon
    He attacked everything in life with a mix of extraordinary genius and naive incompetence, and it was often difficult to tell which was which.
    - Douglas Adams

    http://www.mugwump-fish-world.com/index.php

  3. #3
    You have the basic concept of the rearing jars.

    Here are a few things I've learned attempting to work with them:

    * If the sponge material is too dense water will not circulate through the jar well and the wigglers/fry may not survive. My sponges I bought from AngelsPlus were so dense that the jar would build up about 2 inches of air overnight. I had to use different sponge material
    * Use an air pump rated higher than the tank the jar is submerged into. If working with a 20 gallon tank, look at a pump rated for a 40-55 gallon. This will ensure that the pump is capable of generating enough water movement through the jar
    * Tank water needs to be kept as pristine as possible. Do not allow nitrates to build up and ensure the tank is stable
    * Pre-seed the jar sponges by using the jar as a large sponge filter. By working with the jar as a filter you'll be able to not only seed the sponges to minimize waste buildup in the jar, but you'll also have time to make adjustments

  4. #4
    TAS Guest TasV's Avatar
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    Ok.. thanks.. that's all excellent. I wonder how using a larger sponge gauge would go with a fine covering of gravel to increase the flow and reduce blocking up? When things all go together I am hoping to use a high volume air compressor to power all the tanks. Now that I'm thinking about the hatching jars, too, I think I'll look at getting a series of smaller air pumps as well. I like the idea of having a large hatching tank with multiple hatching jars in it that are running as air-lift filters all the time to keep them functional and calling them into service as required. That way there will also be another source of food for the fry on the sponge material that the fry can graze on between snacks
    Last edited by TasV; 07-21-2015 at 02:52 AM. Reason: New thoughts....

  5. #5
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    Another alternative to the rearing jar is this hang on breeder box. I have used them for a couple years now and have had great success. I use a 2" wide piece of slate in my breeder tanks and just move the slate right into the box a day after they spawn. Once they go to wigglers I just shake them off the slate and remove it. I place the slate in the box so the eggs are under the inlet tube so they get a constant flow of fresh water over them.

    Here is a link

    http://www.finnex.net/index.php/breeder_box

    Here is a video showing how they work

    https://www.youtube.com/watch?v=gJSx_iBXIls

  6. #6
    TAS Guest TasV's Avatar
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    Another good idea! I've not seen them for sale in Australia, however, the general concept should be very easy to DIY!

  7. #7
    TAS Guest TasV's Avatar
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    Damon, how big are those boxes? I looked at the link but it doesn't seem to mention a capacity. I found these here in Austraia: https://www.aquariumproducts.com.au/...hp?prodID=6504

  8. #8
    Quote Originally Posted by catsma_97504 View Post
    You have the basic concept of the rearing jars.

    Here are a few things I've learned attempting to work with them:

    * If the sponge material is too dense water will not circulate through the jar well and the wigglers/fry may not survive. My sponges I bought from AngelsPlus were so dense that the jar would build up about 2 inches of air overnight. I had to use different sponge material
    * Use an air pump rated higher than the tank the jar is submerged into. If working with a 20 gallon tank, look at a pump rated for a 40-55 gallon. This will ensure that the pump is capable of generating enough water movement through the jar
    * Tank water needs to be kept as pristine as possible. Do not allow nitrates to build up and ensure the tank is stable
    * Pre-seed the jar sponges by using the jar as a large sponge filter. By working with the jar as a filter you'll be able to not only seed the sponges to minimize waste buildup in the jar, but you'll also have time to make adjustments
    I had one of these and found it to be a royal pain in the rump. It quickly proved to me to chuck the idea.

  9. #9
    Quote Originally Posted by TasV View Post
    Damon, how big are those boxes? I looked at the link but it doesn't seem to mention a capacity. I found these here in Austraia: https://www.aquariumproducts.com.au/...hp?prodID=6504
    I believe the large boxes are about a gallon....
    Jon
    He attacked everything in life with a mix of extraordinary genius and naive incompetence, and it was often difficult to tell which was which.
    - Douglas Adams

    http://www.mugwump-fish-world.com/index.php

  10. #10
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    Quote Originally Posted by Mugwump View Post
    I believe the large boxes are about a gallon....
    Yes they hold one gallon

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