OK....not new to reefing but I am new to BRS two part dosing. I used to use bright well and ESV. So, I was doing daily testing and got nice numbers. But,I needed to know how much to daily dose so daily testing was not necessary. I got my numbers 1450mag,9.0alk,and 460 calc. I waited to test an entire week so I could figure the difference in my last tests numbers ,subtract the difference then divide by 7(representing days). My Mag did not change. I expected that. My Calc went up roughly 5ppm to 465. I knew that my Alk would be low. It was. It tested at 6.3. Last week's numbers were1450mag,460cal,and 9alk. This week's numbers 1450mag,465cal,6.3alk. The question is.....how is it only the Alk changed and why didn't calcium change? Hoe do I figure a daily dose(calcium) on a parameter that actually went up(Alk loss)? Thank you!