24ppm of the 100ppm dose rate, is not going to have a noticeable effect on the beer. Some german beers exhibit 3x that much in pale lagers(although you can CERTAINLY taste it at that point).
I would strongly advise against the usage of meta for de-oxygenation of tap water.
Why? Does it require the dose to be higher, or does it just not work?
If it doesn't work, period, I'd begin to question whether the meta is doing anything at all.