I assume the oxygen is getting introduced because I use 2 rubbermaids and a 5 gallon pail. Water from one (it doesnt sit for more than a couple days) mix in the other and I use the 5gal pail to measure. As I dump and stir there are thousands of air bubbles making it to the top and then I repeat 2 more times.

Is this good enough? I have had no problems.