have done them and they are 100 percent for real, no gimmicks.

As real as the Easter bunny.

here is this same guy again who denounces things without trying them.

LOL!  Who said I have not tried them?  There was a local raw food restaurant that had one and I was friends with the owner.  So he had me try it.  No difference in how I felt whatsoever.  But I know other people who owned tried the machines with nobody's feet in them and guess what? Yep, the same color change of the water and scum.  Then our local news station also exposed this scam by first talking to a chemist who explained why the color change.  Then they again had the machine run  with nobody's feet in the water.  And once again the same water color change and scum.

there are not enough hydroxides to make scum from the plastic containers.

Based on what?  You probably did not even know about the hydroxides before I mentioned them.  

Here are some videos proving this is a scam:

http://www.youtube.com/watch?v=f0-Ogaa4jZA

http://www.youtube.com/watch?v=aJNnTKw8-jE&feature=related

also, people report that much less noticeable change in the water occurs with repeated sessions. you can do it in a porcelain bath tub and see that the container has little to do with what appears in the water. or just wash your feet first.

They do?  I have never seen anyone report this including the people who offer this scam.

not only are they real, but if you have adrenal problems, be very careful to not overdo them. the first session i had i did for too long and it took me a week to recover. subsequent sessions i did for the recommended amount of time.

So not only do they not work, but apparently they can be dangerous.  Thanks for the warning.

the color of the water is really not related to the issue of how effective they are.

Because they are not effective at all.

all you have to do to prove it to yourself is go to one of these spas that have the machine, usually they charge 20-40 dollars per session. the new units aren't that expensive on ebay, usually under a grand.

All you have to do to understand it is a scam is to watch the videos and learn some basic chemistry.

the initial technology was used by the australian army to deal with chemical weapons in the field.

Sure, whatever.

The coils get rusted out. The foot baths were causing hair loss on my feet. Hmmmm. I have my own kit at home. Foot baths that use coils are a gimmick unless your feet enjoy a dose of rust. I would never again saok my feet in rust. Salt+metal coil springs+ electric frequency=rust =unhappy feet.