Is there such thing as good or bad bacteria?

No

Explanation:

Good bacteria, also known as beneficial bacteria,are defined as ANY BACTERIA that are beneficial to the body and enhance health. One of the most well known types of good bacteria are probiotics. Actually, most bacteria are good. Comparatively speaking, there are only a handful of BAD BACTERIA out there.

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.