By code we have to run everything into the septic tank also and if there is a replacement or repair where there was a rock pit or something we used to drain the gray water into it has to be pumped and filled in and unhooked from the pluming.
I have always been under the understanding the bacteria that breaks down solids in black water is going to happen anyway in nature and multiply at the rate it can sustain its self by the amount of available "food" and adding more specialty bacteria just costs you money and doesn't actually do anything positive.
I stay away from them but ymmv they say to throw a few inexpensive yeast cubes in a new system and that's all that's necessary to get the colony started after that watch dumping large amounts of anti-bactierial agents in.
I have always been under the understanding the bacteria that breaks down solids in black water is going to happen anyway in nature and multiply at the rate it can sustain its self by the amount of available "food" and adding more specialty bacteria just costs you money and doesn't actually do anything positive.
I stay away from them but ymmv they say to throw a few inexpensive yeast cubes in a new system and that's all that's necessary to get the colony started after that watch dumping large amounts of anti-bactierial agents in.