Maybe you should ask for a discount as a repeat customer buying fish. I hate to be harsh, but honest. You are killing your own fish. And your pondweed story does not make sense at all. You just do not have spontaneous reeemrgent growth and die off with white cap or sonar.
First, you are trying to do too much, too fast in too small of pond. The smaller the volume, the smaller margin for error. It does not matter that baby bg are good at surviving low O2 levels. You should not be putting them through that to begin with. Nor any fish. I would not restock anything until I figured out what went wrong. What is wrong. Why you are having crazy vegetative results. Until you get that figured out and the vegetation settled in and working, you could go through the same thing over and over. Putting more fish in is not the answer, stabalizing the pond is.
