I thought they used 35%w/v in the formula. I think before I retest it this afternoon I'm going to rack and return it to make sure its homogenized. This is only 3 gallons and if I ruin it (which I don't want to do) I won't loose too much sleep. I'm going to monitor this daily for the next couple weeks without adding any more peroxide just for the sake curiosity. One thing I've often wondered is with vacuum racking whether splashed or not, does it add oxygen or perhaps reduce it?