My tube from my oxygen reg to the aeration wand has condensation in it, i bought a filter for the oxygen and put it inline in the tube and anyways the question is regarding sanitation.
Not sure, but a quick guess would be that the o2 is colder than room temp, and the temperature differential between inside and outside of the tubing caused condensation. If that is the case it would be moisture present in the o2/air in the tubing. Nothing to be worried about.