I do have chloramines but they are at very low concentrations. I heard that the perlite in a bag could be used as habitat for the microbes. I innoculated my flood table and rez so we will see if there is any effect at all.
I don't have root problems, but then again, I don't want them either. I can definitely see the rationale for saying that they only help in soil in terms of uptake as they will help fix nutrients in a usable form for the plants. But on the other hand, the hyphae of the fungus will actually serve to dramatically increase the surface area of the roots which should increase uptake.