Buyer Beware: Buy and use only cannon balls with Stainless Steel eyes. These still produce electricity but give you about 8 hours of fishing before they give off a weird EMF that repels fish. Unfortunately they are hard to find. Every time I check out the tackle section of the big box stores all I see are brass or aluminum eyes on all their cannon balls and weights.
Lengthen the life of your balls: Drying and letting rest for a few hours will stop the ionization of the metals until you use it again. Using oil, like X10 will help dramatically; make sure the ball is dry before you apply it.
I coat my balls with latex rubber. Tie a short piece of twine to the ball and give the whole thing 3 coats of latex rubber. If no metal is exposed to water there is no EMF = No Problems.
Terminal Tackle: No Brass: Make sure all your terminal tackle is good quality stainless steel. No brass. This combination gives off a weird EMF signal fish don’t like.
No Rust: There is such a variety of hooks out there it’s hard to know what to buy. Heinz 57 alloys produce a weird EMF that fish don’t like as does tempered high carbon steel in salt water. Manufactures know this and coat the hook with a rust inhibitor that reduces the EMF to minimal but the minute the coating is compromised ionization starts with earnest and will soon repel fish.
I buy stainless steel for salt water use and test them in a sea salt paste. If rust occurs in the first 24 hours don’t use them. They are hot! You will get a couple of hours of fish catching ability, if no rust occurs in 24 hours they are perfect and can be used indefinitely.
Brass and Aluminum: Should never touch salt water. Like most outboard motors are loaded with brass nuts and bolts. These create a huge EMF field that fish hate. Newer outboards are notorious for this. They rely on a thin coat of paint to isolate the brass nuts from the aluminum frame. In time the paint deteriorates due to ion transfer and the motor produces more EMF than your zincs can handle. So guess what? The whole dam thing is a battery and if it’s mounted on aluminum boat now you are amplifying it. Keeping the surface greased with an anti corrosion spray will give you about 12 hours fishing before the whole rig gets too hot to catch anything.
Fishing Fresh Water
The same principle holds true for fresh water but the difference is you get more fishing time before your gear starts repelling fish. Fresh water has infinite variables when it comes to EMF’s depending on what dissolved minerals are present in the water. Every lake and river has its own EMF signature. When fresh water has less than 50ppm of TDS none of this matters. Water this pure poorly conducts electricity.
Check your boat:
Zincs – clean all your zincs regularly. Remove if possible and remove all white corrosion then re-install or replace with new ones. Heavy corrosion will not let the zinc do its job.
Loose wires – always check for any loose wires as this could put out a huge EMF field. You’ll never catch fish until it’s fixed.
Rusty nuts, bolts and screws: If you have read this far you get the picture, right? Replace with stainless steel