Quote:
Originally Posted by cdowns
i've had a bunch of different tanks that the floats off the sending units have gone bad and came loose and previous owners just put new floats on and left the old ones in the tank// most i've ever had was 3loose floats in the tank
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This was going to be my guess. Aren't they bronze?
Since these tanks are exposed to the public and a lot of us don't have a locking cap, it could be just about anything. In the old days, some kids would dump a marble or two in there to irritate owners. Never know what it is.