Frog Trawl
![Marine Pollution - Trawl Instructions.jpg](/proxy/?url=https://content.instructables.com/FV5/PVQZ/IZ4UEU7V/FV5PVQZIZ4UEU7V.jpg&filename=Marine Pollution - Trawl Instructions.jpg)
We will show you how to make a frog shaped bridge trawl using $15 materials from IKEA and other hardware stores.
Materials
![스크린샷 2017-02-13 오후 10.23.36.png](/proxy/?url=https://content.instructables.com/F5G/TJCS/IZ4UEU9E/F5GTJCSIZ4UEU9E.png&filename=스크린샷 2017-02-13 오후 10.23.36.png)
Here are materials you will need
1. Krokig (Wall storage with hooks): IKEA, $4.99
2. Rope 3.9mm: Home Depot, $2.98
3. Binder Clips small: Staples, $3.79
4. Mesh Wash Bag (Large): Home Depot, $3.79
5. Recycled water bottle (2 bottles)
Place the Wash Bag Inside the Mouth of the Krokig
![IMG_1305.JPG](/proxy/?url=https://content.instructables.com/FIY/QX99/IZ4UEUA3/FIYQX99IZ4UEUA3.jpg&filename=IMG_1305.JPG)
Put the wash bag in a smaller hole of the krokig and leave the mouth opened.
Clip the Wash Bag to the Krokig in All Sides
![IMG_1308.JPG](/proxy/?url=https://content.instructables.com/FZQ/EO8X/IZ4UEUA7/FZQEO8XIZ4UEUA7.jpg&filename=IMG_1308.JPG)
![IMG_1309.JPG](/proxy/?url=https://content.instructables.com/FLZ/PCUM/IZ4UEUAA/FLZPCUMIZ4UEUAA.jpg&filename=IMG_1309.JPG)
![IMG_1323.JPG](/proxy/?url=https://content.instructables.com/FN1/V5SA/IZ4UEUAF/FN1V5SAIZ4UEUAF.jpg&filename=IMG_1323.JPG)
Using the clips, fix the wash bag on the krokig. You can check the bag if it's fixed well by pull out.
![IMG_1321.JPG](/proxy/?url=https://content.instructables.com/FEC/ZBVL/IZ4UEUAC/FECZBVLIZ4UEUAC.jpg&filename=IMG_1321.JPG)
It should look like this, now let's put weight on to it
With the Rope, Tie a Knot
![스크린샷 2017-02-13 오후 10.26.26.png](/proxy/?url=https://content.instructables.com/FLM/1SOF/IZ4UEU9X/FLM1SOFIZ4UEU9X.png&filename=스크린샷 2017-02-13 오후 10.26.26.png)
![스크린샷 2017-02-13 오후 10.26.33.png](/proxy/?url=https://content.instructables.com/FJW/28G1/IZ4UEU9Y/FJW28G1IZ4UEU9Y.png&filename=스크린샷 2017-02-13 오후 10.26.33.png)
Tie a knot on to each side of the krokig with a rope.
Tie the Other End of the Rope to a Recycled Bottle
![스크린샷 2017-02-13 오후 10.26.41.png](/proxy/?url=https://content.instructables.com/FL1/01TT/IZ4UEUA0/FL101TTIZ4UEUA0.png&filename=스크린샷 2017-02-13 오후 10.26.41.png)
Tie the other end of the rope to a recycled bottle, do it for both sides
Note: Put rocks and pebbles in each water bottle so that krokig can be half submerged in the water
Tie the Rope on the Top Two Sides and You’re Done!
![스크린샷 2017-02-13 오후 10.26.50.png](/proxy/?url=https://content.instructables.com/FVV/514M/IZ4UEUA2/FVV514MIZ4UEUA2.png&filename=스크린샷 2017-02-13 오후 10.26.50.png)
Tie the rope on the top two sides and you're ready to trawl!!
We first tested this trawl in Spring of 2017 and it performed very well.
Process Samples
![8.jpg](/proxy/?url=https://content.instructables.com/F09/23QC/J20PK2BQ/F0923QCJ20PK2BQ.jpg&filename=8.jpg)
Check out how to process the samples collected.
https://www.instructables.com/id/Citizen-Science-Processing/