larva snaggers : what design is best and most gentle?

larva snaggers : what design is best and most gentle?

Postby r33fking » Tue Oct 27, 2009 4:09 pm

i have seen quite a few designs ,some with catch cups , some with pvc but which is best for shrimp collection ?
i plan on also using it for fish so versatility is key for my uses .
please help i need to throw one together i have a bunch of hingebeak larva gettin there butts kicked in a 20 gal glass tank
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Re: larva snaggers : what design is best and most gentle?

Postby PaulG » Wed Oct 28, 2009 9:19 pm

I've caught many many a shrimp hatch with the bog standard PVC snagger with a drink bottle attached eg. the same method as in kirkendoll's Peppermint shrimp book.

My next orchid dottyback hatch I'm going to try this out & see how it goes.
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Wed Oct 28, 2009 11:51 pm

is that the design with the S curve(sideways) . im very interested in that design because its air driven but i dont understand how the S curve works . i see that the air draws the larva in but after that i dont see how they can make it thru the S curve . are the top of the two vertical pipes capped ? i just dont get it
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Re: larva snaggers : what design is best and most gentle?

Postby PaulG » Thu Oct 29, 2009 12:25 am

Have a look at this thread viewtopic.php?f=132&t=2652&p=27714

I've fixed the links up to my images.

The snagger works on an air lift to pull small amoutns of water into the vertical piece of pipe. Don't have much time to explain it in great detail atm need to go pick some fish up soon, If it still doesn't make sense let me know.
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Thu Oct 29, 2009 3:55 pm

thank you sooo much i dont know how i missed that thread.
does it need to be tilted a little to function? as it is in the picture in the thread
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Re: larva snaggers : what design is best and most gentle?

Postby PaulG » Thu Oct 29, 2009 5:03 pm

r33fking wrote:thank you sooo much i dont know how i missed that thread.
does it need to be tilted a little to function? as it is in the picture in the thread



No it doesn't need to be tilted, thats just how it decided to sit in teh tank. As long as the horizontal section of the snagger is at least half under water its fine.
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Re: larva snaggers : what design is best and most gentle?

Postby TheChemist » Thu Oct 29, 2009 5:26 pm

In my experience it works better if it is tilted a little bit (tilted away from the hole and towards the bottle), but it also works if it aint tilted.
And another thing I notice is try to use as much surface area for the screen as possible. Mine has a window that is to small and/or the screen is to fine, so it clogs up fast and I need to clean it daily to keep it functioning. Other than that, catching shrimp is relatively easy compared to catching fish. This awesome shrimp trap fails miserably with fish.
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Re: larva snaggers : what design is best and most gentle?

Postby PaulG » Thu Oct 29, 2009 5:50 pm

TheChemist wrote:In my experience it works better if it is tilted a little bit (tilted away from the hole and towards the bottle), but it also works if it aint tilted.
And another thing I notice is try to use as much surface area for the screen as possible. Mine has a window that is to small and/or the screen is to fine, so it clogs up fast and I need to clean it daily to keep it functioning. Other than that, catching shrimp is relatively easy compared to catching fish. This awesome shrimp trap fails miserably with fish.


Agree completely with the surface area of the screen.

I use 120um mesh so I can keep bbs in teh snagger as well so I can feed the alrvae before I find somewhere to move them too, I find this is ok for 2-3 days but after that yes the screen does become clogged & either the flow stops & all the larvae sink to the bottom & die or the snagger overflows giveing the broodstock a nice snack.

Cleaning the screen after it has been clogged is another problem which I've solved by soaking the bottle in a bleach/water solution for a few hours. Gives much better results than what scrubbing alone can provide.
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Re: larva snaggers : what design is best and most gentle?

Postby TheChemist » Fri Oct 30, 2009 1:19 am

PaulG wrote:Cleaning the screen after it has been clogged is another problem which I've solved by soaking the bottle in a bleach/water solution for a few hours. Gives much better results than what scrubbing alone can provide.


So true! Its a pain to clean it without bleach. I use concentrated bleach. It takes a minute and the screen is like new.
Andy

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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Oct 30, 2009 1:42 am

heres mine ... well minus the mesh . im going to joanne fabrics tomorrow !
i used 1/2 inch pvc , i hope it will do
thanks for all the help
8)
how do i post pictures on this thread???
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Re: larva snaggers : what design is best and most gentle?

Postby TheChemist » Fri Oct 30, 2009 9:54 am

r33fking wrote:how do i post pictures on this thread???


Easy, go to photobucket.com, upload you image there and then post the [IMG} link here.
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Re: larva snaggers : what design is best and most gentle?

Postby "Umm, fish?" » Fri Oct 30, 2009 10:26 am

Looks like this:


Code: Select all
[img]http://www.theURLtothepicture.com[/img]
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Nov 06, 2009 3:03 pm

what is the best design to snag larval fish?
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Nov 06, 2009 3:03 pm

what is the best design to snag larval fish?
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Nov 06, 2009 3:03 pm

what is the best design to snag larval fish?
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Nov 06, 2009 3:03 pm

what is the best design to snag larval fish?
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Re: larva snaggers : what design is best and most gentle?

Postby r33fking » Fri Nov 06, 2009 3:05 pm

oops my mouse button stuck
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Re: larva snaggers : what design is best and most gentle?

Postby TheChemist » Sat Nov 07, 2009 6:10 am

The traps I made work awesome for shrimp, but do not work so good for fish larvae. And I remember reading somewhere that using a screed to snag fish larvae often results in early larvae mortality. That being said in my humble experience usual larval snaggers do not work well with fish larvae.
Andy

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