Thanks, Brent!

First, the water is a turgid gray color.  I don't see any bubbles.  I 
did brush the rebar a bit and the ruler and square shoulder where I 
attached the clips.  Maybe I'll put a multimeter on it see if it reads 
anything.  If the charger is set for 12 volts  6 amps and it is 
presumably DC (charger wouldn't put AC into a battery would it?) I 
should be able to get a reading if there is a circuit created.

I did not have to do anything different when setting up a 5 gallon 
bucket for the horseshoes, but I did use 4 pieces of rebar instead of 2.

I'll let it 'cook' tonight and check for current tomorrow and report back.

bh