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Magnet Fishing
A few of the guys at K&J Magnetics have gone fishing; magnet fishing, that is! Join us as we try using magnets to grab metal objects hidden underwater.
What’s magnet fishing?
Magnet fishing uses a strong magnet to try and grab ferrous metal objects that are hidden or lost underwater. If you want to try grabbing something lost on the bottom of a lake, pond, or river, a magnet on a rope might do the trick.
What magnets should be used? As mentioned in our article about Mounting Magnets, many of our customers have reported success using strong Mounting Magnets. They are durable, and you can easily tie them onto the end of a rope.
Our MMS-G magnets are popular, with an eye-hook for attaching a rope or cable. Some of our customers have reported good results using an MMS-C and MMS-D magnet screwed together, with the rope/cable/cord tied on the space between them. The idea is that this combination might be more likely to catch onto an object below the water’s surface.
For long term underwater use, consider Plastic Coated Magnets for a waterproof solution.
What magnets did K&J use for this fishing trip?
We picked 2” diameter MMS-C-Y0 and MMS-D-Y0 magnets, and screwed one to the other. Then we tied a rope between them. Make sure you torque the two magnets tightly together. If they come unscrewed underwater, the rope won’t hold them!
Not satisfied with this, we figured that we should show up at the lake with some bigger, stronger magnets that would be ridiculously strong. For the monster magnet picker-upper, we bolted three MMS-B-Z0 magnets across a length of aluminum extrusion, and tied that to our rope. This setup is a lot more powerful, so we did worry about it getting attached to something that would exceed our ability to pull up with a rope.
This setup is more poweful than you really want for magnet fishing. We don't recommend it. We only used it here in the spirit of so many TV shows and blog articles that go over the top with extra strength. It's like the Mythbusters guys blowing stuff up at the end, simply because they can. If we had accidentally stuck these magnets to the steel frame of a dock, the magnets might still be there now. Choose magnets that you'll be able to pull free with your rope!
From the dock
We started our tests from a dock at a local lake. To make sure we would have at least one successful “find,” we tossed a steel bottle opener into shallow water near the dock.
With the MMS-C-Y0 and MMS-D-Y0 magnets secured to the end of a rope, we tossed the magnets in hoping to grab the opener. These magnets are strong, or we’re lucky, because we were able to grab the opener easily on the first toss. It works!
Granted, this was in shallow water. On such a sunny day, we could see the opener lying on the bottom. Still, it’s proof that magnets like these are a handy way to pick up a dropped object.
Next, we tossed the bigger magnets off the end of the dock, searching for whatever we could find. On one of our first throws, we captured a big pipe elbow and a large fishing hook. The heavy, rusty pipe was an easy grab for the powerful magnets. A few snails nestled inside the pipe came along for the ride.
From a boat
To cover more distance, we set out in kayaks to drag the magnets across more lake-bottom. With the magnets dangling on 50+ feet of rope, we went hunting for treasure on the bottom of the lake.
The experience wasn’t completely problem-free. When going by a rocky area, the magnet and rope sometimes got caught in the rocks. In a kayak, it was easy to back up and go yank the magnet out. In a motorboat, we might have simply broken the rope.
There’s lots of stuff sitting on a lake bottom that could trap a magnet on a rope. Be careful, but also be prepared to lose a magnet.
Most of what we found in our limited, 2-hour fishing trip was closer in towards shore. Near the marina, we found a socket that must have been dropped by an unfortunate boat mechanic some time ago.
Perhaps our most interesting find was something that we were not able to pull up. We located something strong using the smaller mounting magnets. When we pulled slowly up on the rope, the magnets broke free. The magnetic hold wasn’t strong enough to pull the object up.
The object appeared fixed on the bottom. We could find it repeatedly using the magnets. We tried to pull it up using the big 3” magnets, as shown towards the end of the video below. The magnets grabbed onto it well, but still were not strong enough to retrieve the object.
What was that thing? It could have been a boat anchor, firmly wedged into the gunk on the bottom. Our guess was a steel cable strung across the bottom of the lake. It was near some docks, so maybe the cable had something to do with those.
The pull of the magnets wasn’t strong enough to pull the object loose from the bottom. Remember, the pull force you get from a magnet depends on what you’re sticking it to. A powerful MMS-B-Z0 magnet can pull with hundreds of pounds of force when sticking to a solid steel surface (like the one that holds up a person in this video). If the steel object is smaller, though, the force could be a lot less. You won’t see 300 lb of force from the magnet to a paperclip.
What we learned while magnet fishing
Like treasure hunting with a metal detector, magnet fishing is not for the impatient. It’s a big lake and a small magnet, so you might not find much very quickly.
We also learned that there's lots of iron junk on the bottom of a lake! Rusted bits of metal, steel cable, and many rocks that contain iron often stick to the magnets. Periodically, we scraped off iron-bearing dirt and rocks from the magnets. If you’re going magnet fishing, bring a pair of sturdy work gloves to scrape the mess off without cutting yourself on something rusty.
Why would anyone want to do this?
The magnet fishers we hear from seem to fall into two groups: Treasure Hunters and Tool Droppers.
Treasure Hunters hope to find interesting things. Sometimes the found objects can be historically interesting. Rarely, something valuable might be found. While some trips might not find anything of interest, it’s still a good excuse to go sit by the water for a while.
Tool Droppers are after objects that haven’t been in the water quite so long. Maybe that boat mechanic would have liked to pick up his dropped socket. With a strong magnet and a little rope, that 15 feet of water isn’t a problem.
Naturally, we don’t think a toolbox is complete without a magnet or two in it. We always have a few magnets in our toolboxes. We are continually surprised at how often a small, powerful magnet comes in handy. Popular magnets to stash in the toolbox include the D68PC-RB (for identifying poles), the D6C (for magnetizing screwdrivers and other stuff), the TT-8 telescoping pickup tool and of course a single MMS-G-X8 or MMS-G-Y0 if you plan on going magnet fishing soon.
Good luck fishing!
This is a complete guide on how to begin fishing for sunken treasures in the murky depths near you! We will look at everything you will need or may require in your magnet fishing adventures to come.

We will take a closer look at the best magnet fishing kit and the proper rope to get, as well as some tips and tricks and potential treasure locations near you.
Have you ever wondered what lies beneath the murky depths, imagined what treasures that might be found under the surface?
Fishing Magnets For Sale
Well, instead of a lure you tie in a powerful Neodymium Fishing Magnet onto a rope and throw it into a body of water hoping to pull out a metallic ferromagnetic object. Most often folk hope for a valuable or rare item, a treasure you might say. Most often, though, are smaller objects from past times found such as coins, jewelry, nails, bullets, or some other not so valuable yet very exciting junk. You will also often come across bigger items that would require a larger Fishing Magnet like bikes, weapons, electric scooters, shopping carts and even safes.
Neodymium Magnet Fishing is a mix of environmentalism and an adventurous search for treasures and rare objects. It has been a huge deal in Europe for a couple of years and is now gaining traction in America, where many exciting treasures lie waiting to be found.
All you need to actually get started with this inexpensive and thrilling hobby is a Magnet Fishing Kit, and there are basically two types to choose from.
A Neodymium fishing magnet with a top mounted eyebolt is best suited for fishing from a bridge, pier, dock, boat.
It is also recommended in urban canals and other places where you stand above and lower it down to the deep water and there is no need to throw it out.
A side mounted, double sided neodymium fishing magnet is best suited when you need to throw it out and pull it back in, dragging it along the seabed.
It is a more versatile choice and best suited for a beginner.
Get Your Magnet Fishing Kit Today
A fishing kit has everything you need to get started!
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A magnet fishing kit that is bought online usually offers you the required parts, a magnet and a rope, that are essential for your treasure hunt. My best recommendation would be a fishing magnet with a pulling strength of about 500 to 1200 pounds to begin with.
A rope is obviously also a must have, but there are other quite important accessories as well. Some or all of these items may be included in the magnet fishing kit, the best ones have everything you could possibly need for your setup and then some.
It is not by far necessary to get these all-in-one packs though. As long as you get a fishing magnet and a good rope or paracord then the rest of the items could easily be assembled at home.
When preparing your magnet fishing kit it is best to put some loctite glue on the treads of the bolt before screwing on the eyebolt. This is done to ensure that it does not come of after some use. If you choose not to, make sure eyebolt is tightened between every couple of throws.
It is recommended and often included a pair of gloves to use while pulling, to avoid burning or blistering your hands on the rope, and avoid cutting yourself on sharp and rusty objects. When pulling up heavy objects whether that be a safe or a snagged branch, gloves will always come in handy.
Other stuff that are useful to have are a plastic bucket to collect your smaller finds, such as nails, fishing hooks, coins, keys, etc. You might also find a need for a wire-brush to get some of the rust off.
A Magnet Fishing Grappling Hook Might Be A Good Tip
If you are having trouble getting your catch out of the water using only a fishing magnet, a grappling hook could be used for the last stretch of the way. The best and largest magnet fishing kits some times include this but it is usually not necessary. You could always leave your find in the water and come back for it at a later time, with more tools at your disposal than just your fishing magnet.
A starter kit will have you out by the water in no time. It is as easy as it is affordable. Get yours today!
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For fishing you need incredibly strong magnets compared to their small size. The ones that are universally accepted as the obvious choice for fishing, are rare-earth neodymium magnets. They have a huge pull-force against metallic-ferrous objects.
For the best results in magnet fishing, strength between 300 to about 3000 pounds of pulling force is recommended. That is between 140 to about 1400 kilos for all the European readers.
It might seem like A LOT. But what you have to realize is how they measure these values. For that much pulling-force to be engaged, the ferrous object have to be completely flat, 1 cm thick, and cover the whole magnetic surface of the fishing magnet.
Anywhere between a 300 to 3000 pound magnet is best for magnet fishing in most cases. My personal magnet fishing tip would be to get a 800 pound double sided magnet for your first purchase as it is both powerful and versatile.
Is it not a bit overkill getting a fishing magnet that strong?
No, because you will practically never meet the perfect conditions mentioned above when you are magnet fishing, thus never using the maximum amount of pulling force available. Very few objects, like bikes or scrap-metal, are completely flat to begin with, and rust is almost always covering them as “padding” between the item and the magnet. Therefore you will most often only get a fraction of its potential pulling-force, and that is why you have to compensate upwards and get a fishing magnet that seems a tad too powerful.
There are some different brands of fishing magnets out there, like Brute Magnetics, King Kong, Wukong Magnets, King Kong Magnetics, Muscular Magnetics, all offering their products at Amazon. but the best thing is that it really doesn’t matter what you get. A magnet is just a magnet as long as the seller is trustworthy. Therefore the best tip i can give you is to pay as little as possible for your fishing magnet as long as the reviews are good.
With a strong magnet you need a strong rope that is both durable, water-resistant, and can withstand both abrasion and cutting, against sharp rocks and objects. I would say that a nylon paracord between 50 ft and 100 ft is needed depending on the location you want to go fishing.
My best magnet fishing tips would be to get two 75 ft paracords that you can tie together if the need would arise. If so, you are prepared for every condition you will face. Whether that be throwing a double sided fishing magnet in a shallow river or dropping it down from the top of a pier.
Do not miss though that there are different nylon paracords that vary in strength. Make sure to get a paracord grade high enough to at least matches the force your magnet is able to pull. And make sure you use a proper Palomar knot securing the magnet to the rope.
The Best Spot To Go Magnet Fishing - Location Tips
When looking for a good magnet fishing spot you might want to consider how many people that pass by on a daily basis. A good revenue of people often result in a lot of lost coins, jewelry, wallets, watches as well of a lot of littering. But the amount of people that pass by can also have been in the past. So any place with a history of industry or war is usually also a good spot to find antique objects and collectibles.
Here is a quick list of places to look for. If you want even more tips for your magnet fishing adventures check this in-depth article including a treasure map of potential sites of war where history might have buried it’s past.
Urban rivers is probably the best of my magnet fishing tips for finding a lot of stuff quickly. Just be aware that a lot of people passing by results in substantial amounts of junk too.
Anywhere that is abandoned there have usually been a lot of thrashing and thrown away stuff too. You can often find large metallic objects that has been dropped by mistake or thrown in after the place became abandoned.
When people are throwing stuff away illegally or hide stuff they don’t want it to be found. So, where do they hide it? Under a bridge of course. There is a reason there are folktales of trolls under bridges to keep folk from looking for their hidden treasures.
Old wells can be a real treasure trove. It was often used as wishing wells back in the days and can have accumulated an old fortune in coins. It is similar to fishing ponds today, many people throw in a coin or other small valuable for luck.
Many people use these places to transfer between a boat and main land, or just stand very close to the edge fishing or enjoying the view. That being said you can imaging all the things dropped or lost in the water beneath. Not to mention all the fishing lures you will find.
Any where with a long history of prosperity or war you can find a lot of interesting old artifacts. My best tips would be to check out this map of old war locations. Perhaps you will find some thrilling object from past times.
Fishing Magnet Near Me
Besides the exciting thrill of the adventure or the anticipation of the next possible treasure spot you have come up with, there are some other matters to keep in mind.
As an environmental hobby there are some ethics to live by. Anything you you pull from the waters, are not to be thrown back in. These metal objects do not belong in the water and can contaminate it over time and disrupt the ecosystem.

Please, try and bring with you some form of storage that you can use to bring your magnet fishing finds with you and dispose of them in a recycling station.
Stay Safe When Looking For Your Next Magnet Fishing Finds
When magnet fishing it is important to respect the rules of the land and people around you. It is not always allowed to fish and and that includes magnet fishing.
Be careful about where you throw your magnet. If you have a strong magnet you do not want it to get stuck on a metal beam or something similar where it will be difficult to get it to detach itself from. Also do not keep it near any electronic devices, like a phone or computer as it might demagnetize the hard drive and damage it.
If any items, such as weapons or obviously stolen goods are found, you should contact the police as a general rule. You should look up the local law on this yourself to make sure you do right by yourself and don’t get in trouble.
The short answer is that it both is and isn’t. It depends on where you are in the world. What is true for practically everywhere is that magnet fishing is a grey-zone because there are often no direct laws on this wonderful outdoor hobby of ours.
If you want to know more about the magnet fishing laws where you live you can get a deeper dive into the matter in this article right here.
One of many magnet fishing tips is that someone’s junk is another mans treasure. And that is true for a multitude of reasons. Junk can be very interesting on its own, in telling the story of a place. And with time, a lot of items gain value and become collectibles that are deeply treasured by some.
Fishing Magnet Ebay
Some of the more valuable or dangerous finds when magnet fishing was even reported in the papers and on the news. Like this boy who found an unexploded World War Two bomb. But grenades and weapons along with safes full of gems.
