I don't have any dosing pumps, no controllers, and I don't do the BRS 2 part per the directions either. I do dose/drip some things, but it's more like a calculated 'seat of the pants' thing based on my previous readings. Today, I haven't checked my big 3 in over 3 weeks. Since that check I have done a 15% WC, and dosed some things, including my daily drip of 60ml vinegar with 30ml Kalwasser- mixed into a gallon of RO/DI and dripped in slowly to my sump over about 3 hours. I do have a fairly large coral load. So today I had: Alk- 8.5 Ca- 430 Mg-1500 Overall pretty happy with those #'s!