I forgot to mention some important details, but didn't include it as I am lately just inoculating my soils at different stages with different mixes. Didn't think its relevant but let me explain, seeing a lot of you guys are doing this with DWC it might be applicable, at the very least quite interesting.
The trick in soil after inoculations to control a fungi or bacterial dominate soil life is simply to control the ph of the medium. Also bear in mind like mentioned above when looked under a microscope you will find both fungi and bacteria, however with PH adjustments, you can let one thrive and the other struggle a little bit.
What PH does bacteria prefer?
Most bacteria grow best around neutral pH values (6.5 - 7.0), but some thrive in very acid conditions and some can even tolerate a pH as low as 1.0. Such acid loving microbes are called acidophiles. Even though they can live in very acid environments, their internal pH is much closer to neutral values.
What PH does fungi prefer?
In comparison, fungi thrive at slightly acidic pH values of 5.0–6.0. Microorganisms that grow optimally at pH less than 5.55 are called acidophiles.
So in a nutshell soil gets inoculated (need to setup for brewing again) and then I try keep PH at around 6.5 - 7.0 for veg, then drop it down to about 5.8 - 6.0 for flowering. I do this mostly with the water/water+feed that the plants receive.
Maybe the same is possible in DWC, however I do know with brewing teas sometimes PH goes all over the place.