I ran my water softener regen last night with a 30 minute backwash, 120 minute BD/SR and 20 minute FR and I had filled the brine tank and well with water. I measured the GPM at 2.6 for the backwash as well, and the manufacturer says 2.4 is more than enough for it to do its job. The taste of the super iron out cleaner is still there, not even reduced. I absolutely cannot see how the resin could be causing this but unless anyone else has any other ideas I am going to try to replace the resin.