>>1358442Anything ferrous metal (which will mostly be junk). Water.
>>1358423I've done it on occasion, have gotten some cool but ultimately pretty worthless stuff.
>old corroded cheapo fishing rods/reels>more 5lb mushroom anchors than I have any idea what to do with>2 corroded to shit trolling motors>thousands of pounds of miscellaneous scrap metal>one rusted to shit cheapo revolver beyond repairFound out the hard way you don't use a magnet with more pulling power than your back does, probably got stuck to an old sunken car.