dzb912;1372233; said:
air and oxygen have the same meanings
In it's elemental state, yes air and oxygen are regarded as the same, however, in this hobby/industry, you need to be aware of the terms you use when referring to some things. An average non-aquatic individual might feel two things are the same, another in this field however, most likely will not, and here is why; Air is oxygen - True, however, they do not have the same meanings when you are dealing with aquatics. With use of Air stones, air pumps, air tubings, bubble wands, ect., etc., the theme of "Air" and not Oxygen, is reoccurring. However, when you move into more complex systems, you hear hobbyists refer to some aeration/injection units as delivering "Oxygen", "c02", "Ozone", etc. This is because on one hand, you have ordinary atmospheric air which is being sucked from the surrounding area, and pushed into the tank to create bubbles - essentially. On the other hand, you have pressurized/Compressed, or mixed elements, with pure oxygen, which is delivered generally through an injector or other diffusion source depending on your particular set up and needs. SO - while yes, some may consider them the same thing, they will not always have the same meaning, nor will they always have the same components, so even though I am sure we did understand what you were trying to explain, it might behoove you to not be quite as reactionary next time someone asks for clarification.