Areobic bacteria require ...

Areobic bacteria require air, a lot of it.  All living things require Carbon, Nitrogen, and Phosphate. The suprise is that they require it in the same proportions.  The usual limiting factor is phoshate, but not always.  For example, when trying to digest certain food products with bacter the limiting factor was nitrogen: so we added urea.  Phosphate was also limiting so we used a small amount of phosphoric acid. There was a lot of carbon present in the product so no problem.  The pH range for most bacteris is about 6.5 (better to thin 7.5) to 8.5 (better to think 8).  I know, there a lot of bacteia that don't follow this.  But for the most part you will also see the algae species growing above 8.2 pH  so we have different growing conditions that will generally follow pH, which you can drive down with a little phosphoric acid. 

Anerobic bacteria are different. 

For the large part, this all depends upon what you are trying to do.