And with the water being hot, bacteria grows faster than in a cold swimming pool.  

The enzyme was a bacteria that digested the urine.

My understanding is if you just say turn a hose bib on outside the water would jet out with the bacteria into the air and into your lungs. 

Stains, dents, its also a very porous surface and it can be a bacteria nightmare. 

I want to eliminate the bacteria causing the odor.

I continued to do those types of tasks, but that message kept gnawing at me more and more like flesh eating bacteria.

If you have an ongoing issue the results will be temporary but if the problem was solved the ozone will kill the bacteria that is making the odor for good.

Carpet is place where all bacteria lives in and causing people sick.

Most experts agree that anything below 120 degrees creates a risk for bacteria to develop inside your water heater from stagnant water, such as legionella that causes Legionnaire’s disease.How to choose a temperature:  https://www.gopreferred.com/blog/what-temperature-should-my-water-heater-be-set-to/

Not only do they know the best way to keep a hot tub clean and bacteria free, but if a guest does get sick it doesn't fall back on you or the cleaner.