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.

[jason604]

Originally Posted by nrosdal

full spectrum will give nicer color and definitely grow sps. But i reccomend 1 fixture for every 2x2 section as the d120s have lenses that focus the light so it will not spread near enough for a 4 footer. Or if you have your mind set on 1 fixture and are happy with that one you should do the same again as i wouldn't put a d120 on anything bigger then 30" (and that is with stripping the lenses off or changing them to 120 degrees).

Was planning to just add another to my tank so one on each side of center brace but prob not now that brad suggest its good enough

Originally Posted by 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.

I'm doing 20G water changes every 1-2 weeks. I keep my KH around 7 I think. How u suggest me to improve my parameters?

[jason604]

My skimmer is pulling out about 3/4 of a 2L pop bottle every 10 days or so. Is that good enough? It's a light green

[Aquattro]

Originally Posted by jason604

My skimmer is pulling out about 3/4 of a 2L pop bottle every 10 days or so. Is that good enough? It's a light green

I don't drain mine into anything, I take the cup off and clean it. I'd say yours is a bit too wet, try lowering the level a touch.
What size total water volume do you have? How much/often do you feed? Any other filter media being used?