Dont suggest it my man, I am biology major at UT, and did some research. Most liquid oxygen formulas contain a pretty good amount of hydrogen peroxide. Now a little of this stuff will help clean out some bad bacteria in your rockwool or growing medium, however a lot can have a nasty effect damaging the good bacteria that coats the roots and helps dissolve nutrients. However, it is a damn good idea. What were you trying to accomplish by adding liquid oxygen might I ask?