And when I've gone back and tested them on a controlled tank, they did
not have those effects.........
I've got algae killing and plant growing experience and ability to
tease apart the real causes.

Whgy did my Caldophora not die if, as Greg has said off record, it's an
algicide?
That implies it kills all algae.
Clearly it does not and I have no issue making these statements,
because I know I'm right about this side of the issue.

I have not stated what it is, but I have stated what it is NOT.
I can simply do a water change/pruning and the same thing can occur.
So is a water change or a pruning an algicide?
Is _not neglecting a tank_ an algicide?

There is no control with any thing folks have done on the APD/Here/APC
etc, or elsewhere I am aware of, when I did it with a control, it did
not occur. Nada. My control allows for stable conditions to occur and
good growth of the algae in question.

If that's not done, you really cannot say much.

Regards,
Tom Barr