More caveats:
Solubility of gases decrease as water temperature increases, so you might get a further increase in air in the lines after you set the loop up and put a CPU's heat load into the water. On the other hand, I seem to recall oxygen solubility being pretty low anyway so that might not be a huge issue. Not a big deal in any case; just open the bleed valve every now and then and fill as needed.
You should check the makeup of the O-ring in your pump as well (and of the block if it uses o-rings or gaskets). It would be bad to add H2O2 if these are reactive.
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