Looks great! My only other recommendation would be to do your testing at the same time of day. Your numbers will swing throughout the day and night. Enjoy!
I do aim to do my testing at the same time each day but I don't always get enough time to run the full slew of test. I've read some articles that state corals consume more nutrients during the day but it seems to vary from coral to coral.
Parameters Update
Did a 5 gallon water change yesterday and cleaned my return line / check valve, boy was that dirty! My flow was slowing down too causing my overflow box to start running low, churning along nicely now. I let the water change circulate for about an hour and then took the following readings.
pH: 8.3 (+0)
Ca: 415 ppm (+20)
Mg: 1340 ppm (+0)
Alk: 8.1 dKh (-0.7)
Using the reef calculator it looks like at 415 ppm Calcium, I should have a balanced Alkalinity of 7.8 dKh. And at 8.1 dKh Alkalinity, I should have a balanced Calcium level of 418 ppm. With the inherent human error of test kits I would say my Ca/Alk levels are balanced, which makes sense.
Aiming for a target 425 ppm Calcium / 9.2 dKh Alkalinity, I would need 0.61 gallons of saturated Kalk to reach the target Calcium and 0.5 gallon to reach the target Alkalinity. From previous test with the baking soda dosing I found out my tank goes through roughly 0.25 gallon of RO/DI in an 8 hour period. Using this I will make 1 gallon of saturated Kalk and have my ATO feed from it. This should last about 32 hours. I will test my parameters again tonight before hooking up the Kalk solution to get a baseline, then multiple times through the gallon process to make sure my levels don't get too high. If I can maintain my Ca/Alk using Kalk I plan to purcahse a Kalk reactor which will be fed with my ATO to prevent clogging up my Aqualifter with Kalk solution.
Corals are all reacting very well to the now proper nutrient levels and gaining back a lot of color and growth. I am so glad I finally decided to start testing. I never had this issue in my past tank because my regular 2 gallon water changes were enough to keep up with the coral demand in the pico tank.
If anyone else is following along and notices anything off with my regiment plan/calculations please feel free to chime in...I'm going based off of the various knowledge I've been gathering these past few weeks.
Possible photodump update coming tomorrow night...