I have been using B-Ionic ever since it was introduced. I always add equal parts. When one of my levels starts to get out of balance I just add one of the parts to bring it back. It's usually the Calcium that starts to fall. For the last 4 months or so I'm having to dose 35% more calcium part 2 than part 1. At the same time my tank is crashing. My tests are showing the results are remaining in my target zone which is 140-145 ml for Alkalinity and 420-425 ppm for Calcium. Test kits are good and doser is working properly.