Yes, it is very easy to bloom that ZHO. And it is a peculiar smell my wife does not enjoy.
Someone here mentioned recently they don't add the ZHO until the second day. My packet came with a 2 ended scoop. The little end, I put 1/4 scoop in 15 liters.
Blooming will depend on, water temp, and how much molasses vs how rich was the starter colonies.
Water on the other hand, natural saturates with O2, depending on temp and what surface exposed to what atmospheric pressure. It really has nothing to do with the bubbles or airstones which I no longer use. It is all about turning the bottom water to the top, for atmospheric pressure, to do the mass transfer of the O2. I have done some research with oxygen test kits on the subject of Flooming. You can look up my experiments. No O2 is dissolved from the bubbles. The bubbles are hot with tiny surface areas. This is well know in Aquarium keeping. They just use a little pump to lift the water these days.
It turns out that water in the range we work it can only hold about 9 ppm O2. So, I went on the hunt for unstaturated water. Tap water? My RO res? No. I looked it up. It doesn't exist. But, it is so important in steam working, it has to be de-gassed before hand.