Thanks Gillie,
I thought about the salt water effect on the copper, and figured that the life span would be less than fresh water.They're easy enough to make in a short amount of time, so I have several made up In the boat.In my case its all fresh water use, although I take them out when at the slip.
I think if they were removed and rinsed at the end of the days use, they would last quite a while in the salt.
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All this,just for a boat ride
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