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DIY Plankton Net Build

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  • Offline TamiW
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DIY Plankton Net Build

« posted: 4 years ago »
Yes, I'm starting ANOTHER thread on the subject. I thought I'd keep the collecting and plankton net threads separate for clarity. (What can I say, I'm a splitter, not a lumper!) I got permission from reef geek to repost the instructions here.Original Post



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So I finally tackled my project to build a Plankton Net. Materials cost me about $16 at Joann's Fabrics. I based the design on a net I'd used before with a student from F.I.T. I took it out early this morning to catch the incoming tide at Sebastian Inlet. The net worked great, though I didn't catch the critters I wanted.

Anyway, here are some screen shots if anyone is interested.

The fabric used is a fine mesh and a little stiff feeling. I forget the exact name but I can get it if anyone wants to know. The wooden ring is a crafting ring that I would not recommend. It worked fine but it was a bit fragile and I ended up gluing it back together a couple of times. The glass jar is just one I had available.




Here's the fabric.


The edges of the material looked like they'd fray rather easily so I did a double turn and hemmed them down.


Finished Edge.


I sewed both edges together for about 10 inches. Then I wrapped the other end around the mouth of the jar and determined the shape I needed to cut to make the funnel and sewed the rest of the seam. This part was tricky towards the narrow end of the funnel so I don't have any pics since i was speaking in tongues at my sewing machine. But here's the seam, double-sewn.




After hemming the mouth edge of the net (not shown) I turned down the edge of the mouth to cover the wooden ring and was able to sew it in place. Fortunately the wooden ring was thin enough to fit below the needle for this.


The finished ring.


Here is the finished net on one of my kitchen chairs to give you a size reference.


« Last Edit: 4 years ago by TamiW »

  • H. erectus, H. comes, H. kuda, H. zosterae, Doryrhamphus excisus, Bryx dunckeri, Corythoichthys flavofasciatus
It's all about the snick!
  • Offline TamiW
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Re: DIY Plankton Net Build

« Reply #1 posted: 4 years ago »
I plan on using a metal ring, I have 2 10" rings from joann fabrics (like this.

I also intend to add a collecting jar at the end.

The first task though is learning to sew! So I will practice test using some cheap fabric. Then I will use 100 micron mesh as suggested by Dan. It's been years since I used a sewing machine, so that's my next step in the project.
  • H. erectus, H. comes, H. kuda, H. zosterae, Doryrhamphus excisus, Bryx dunckeri, Corythoichthys flavofasciatus
It's all about the snick!
  • Offline DanU
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Re: DIY Plankton Net Build

« Reply #2 posted: 4 years ago »
A couple of points you may want to consider.

Mine have stainless steel rings.  These are nice because they won't rust.  Ideally the rings should be either brass or stainless. 

You will need a way to attach a bridle harness to the ring.  Mine have stainless aircraft cable but a good strong rope with 3 points of attachment can work.  My ring is not sewn into the net, rather the net has eyelets to let you fasten it to the ring with rope.  This makes it easy to replace either net or the bridle.

The metal ring is good as it gives it some weight that helps keep the net in the water.  I find I like it a few inches below the surface so that it doesn't pick up as much stuff like seaweed floating on the surface.   A weight or float can be added to the line just above the bridle to help lower or raise it depending on how the net is used and strength of the current.

Having the cod end jar removable makes it much easier to harvest the plankton. 

Dan
  • H. erectus/reidi/barbouri/kuda/comes/zosterae/fisheri/ingens