Gregg, per your helpful instructions on how to figure out how much I should be doing, i have a report. So, when I asked for help for this question my calcium was 380 dkh 9.8 mag was 1420 temp 79.7 ph8.0 on 11/21/17 @ 8.p.m. I used Red Sea pro salt @ 1.25. In testing I used a combination of test kits that I had on hand. Calcium Red Sea and api. Dkh Red Sea reef foundation pro test kit and Hanna. Ph api and Milwaukee mc 122. Temp just measured by Kamoer dosing pump temp sensor. After your instructions I turned dosing pump #1 on using (part 1 Seachem fusion) and turned the other 3 off. Set the amount to 73.0 mil 2 times a day 36.5 mil one at 11 pm and one at 11 a.m. drooped house a/c down 3 degrees and tank temp dropped to 77.4 . Each day I tested at 8 pm and each day I could see dkh dropping and calcium increasing by 10. Yesterday calcium reached 420 and dkh was 9.1 . So I turned dosing pump off for the 24 hour pause. I tested tonight at 8 p.m. and observed the ex act same results as yesterday, with no movement with any thing. I would assume that means I do not need to dose anything and coral are not consuming detectable levels of calcium. Perhaps, the reason calcium was so low in first place is a salt issue, and I admit I did not test after last water change. So I am asking for additional advice if you have any of what to do next.