To much air in the water? Mabey, if it was super saturated with pure O2, but with just air, no.
Acually air stones do not really directly add any oxygen to the water. Very little of the air comming out of the stones is disolved in the water. What the bubbles do is create water movment and moves the surface of the water around some. This movent at the surface is what provides the gas exchange for the water, and where a good majority of the oxygen in the water comes from.