I'm not knocking them in any means about what they do or how they do it.
I am being the devils advocate here though with the test.
1. he didnt shake bottle 2 on camera. Not shaking bottle 2 enough will cause an incorrect reading (low).
2. If all the systems are linked they just did a 58,000 gal water change by hooking everything up to the pond.
I know they "cycled" the pool. We have no idea what they used to cycle the pond or how. No idea what the params were before the pond got put "online".
The solution to pollution is dilution!
Just pointing out what the haters could/would/will say. If you (ofr) are going to post stuff like this you need to cover the options/variables.
Imho this test is probably faulty. I hope its that clean as I want them to be able to truly say to the haters "SUCK IT!"