Additional LED?

[Aquattro]

Light looks fine, color is just a personal preference. The ER 125 is a good enough skimmer, keep it clean regularly and skimming a bit wet. Nutrients are too high IMO for great SPS growth. If your NO3 is that high, your PO4 is probably elevated as well. Get both down for better SPS growth. The WP 40 will help with flow, but might bother your LPS a bit, so you might need to get creative with placement.
You don't need a Ca reactor unless you need to supplement levels beyond what your water changes provide. You do regular good sized water changes, right??
If things aren't growing fast, Ca/alk won't deplete fast.
But you need to test regularly to determine consumption, then once it's significant, you can look at ways to replace. 2 part liquids, dosing or reactors are the most common methods.