"Don't forget a tablespoon of Physan 20 in a gallon of water to rinse in. It will kill any bacteria or fungi or virus from soil so not to contaminate the hydro"

This is pointless to do, bacteria are EVERYWHERE and a simple breath will load your hydro system down with a bacterial culture.

And a good bacterial culture is essential for a properly-functioning hydroponics system. Those bacteria take the non-nitrate nitrogen sources and fix them into nitrates. Those good bacteria also compete heavily and keep harmful strains of bacteria from gaining a foothold and killing your plant.