I think the array makes the difference, but it could be the amperage.

Sure is an easy test, two Stainless steel knives with a plastic spacer, taped or tied with a nylon cable.

Trickle chargers are only 1 max 2 amps (so close to the amplified side of the F165), not Focus TM power level but should be enough to see color.

Max ten minutes to setup and you can be running a test.

Im going to try both feet in one container hooked up to 2 amps off my battery charger running at 12 volts. I have a bunch of stainless steel laying around so im going to make some 'L' shaped cathodes and anodes out of that.

The expensive foot detox systems all use one container.

Whats wrong with just trying it out?

I won't have access to an array (professional cathode and anode) till later this week. That said; how would I know about all the other ones?

The design in the above video is pretty good but the metals are all SS and the spacing has not been researched.
Purchasing an array will give the correct metals the correct spacing and also welded connections. Otherwise any aligator clips or electrical connections inside the tub will also ionize..

Certainly there is more to this just like making colloidal silver.
I mean constant current is what you would want, with the impurities coming into the tub conductivity increases and a trickle charger may be less comfortable.

Another thing is that no plugged in equipment should be used with a tub of water and your feet in it.
Now in the case of the Ultimate Zapper and the F165 I have done a lot of research on those devices and know they will stop before they do any harm. But your Canadian Tire Battery charger wont..