Test time again this morning!
Ca - Hanna HI758
426ppm - Test 1: Old reagent (exp 11/16)
432ppm - Test 2: New reagent (exp 03/18)
433ppm - Test 3: Same reagent as above
Alk - HI755
130ppm - Test 1: Old reagent (exp 03/16)!!!
154ppm - test 2: New reagent (can't remember exp, but it's new)
153ppm - Test 3: Same reagent as above
Mg - RedSea Magnesium Pro Kit
1380ppm
Phos - Red Sea Phosphate Pro Kit
0.02 - 0.04ppm
NO3 - Red Sea Nitrate Pro Kit
32ppm!!!!!
So obviously I haven't been keeping up on my water changes, look at those nitrates! I think it's having a detrimental effect on some of my corals. So I did a ~40g water change and I have another one mixing as we speak. I may do a 40g change every couple days to try and drive those nitrates down. If I do a 40g change every two days for a week that will be approx. 38% water change.
Second point of this post, check your reagent expiry dates
I think that was part of my issue with my parameters seeming funky for the last couple months.