Your microbiological culture also went very well.
I also tried various methods of microbiological I tried to culture it, but there are often cases where the circle is not formed well. I think it would be better to judge it by the overall amount of foam.
It is difficult to see the circle in the 1-ton blue container I use. I looked at the amount of foam that is visible. I understand. If you culture microorganisms many times, you will be able to get a feel for it.
