My daily Alkalinity and Calcium draw used to be about 80ml of B-Ionic A and B. Now it's only 25ml and all sps growth has stopped. I have had major RTN of SPS and bleaching plus tissue release on some LPS. The tank is 75 gallons and I have lost at least 20 corals already. At least I haven't lost any clams and I still see nice new white shell edge. It could be to early to tell if they have stopped growing yet. I have never experienced anything like this in the nearly 30 years I have been keeping Reef Aquariums. The B-Ionic addition is as low as it was when the tank was new with few to no corals.