nice fenner'ism "Don't dose what you don't test!!!"
saltykelly - what is your orp range now in your tank and why do you think you need to hydrogen peroxide ?
Others have used ozone and potassium Potassium Permanganate to raise ORP. But, you need to be REALLY careful using very strong oxidizing agents as it is easy to overdose and really stress the heck out of your corals, etc.
PS I used to use ozone and must admit my water was crystal clear even with 10K halides. However, one day I think I overdosed as the SPS polyps closed up and didn't reopen until I stopped dosing and did a water change.
Scott