Sorry for the delay in posting everyone, it's been a bit crazy with the job, home remodeling, and the wife and I preparing for our first child who should be arriving in the next 2 months or so.
The tank is coming along fine, the priority right now for me being stability and dialing in the doser. I added a pair of LED "China box" lights to the refugium and it's absolutely exploding the Cheato growth and out-competing both the display as well as the frag tank. The phosphates are steady at or just above zero, and the algae in the display is slowly diminishing. I think the "new tank" symptoms are on a downward trajectory and that's obviously a great thing. The alkalinity is stable between 9-10 as I'm dialing in the doser, and I've slowly been reducing the amount of alk I've been dosing nightly (currently 70ml). The calcium is locked in about 430 and so far I've have only dosed 10ml here and there. The magnesium has been the most stubborn and right now even by dosing 300ml nightly, it won't get over 1200. I adjusted the doser tonight to hit it with 400ml, so I'll retest again tomorrow and see where it's at.
Believe it or not, the general maintenance on this thing hasn't been bad at all, which I credit to both Pedro and my project planning, and his system design and setup. Besides replacing filter floss and cleaning skimmer weekly, and testing 2-3 times a week, there's not much I have to do.
Oh yeah, and I swapped out the Ushio 14k's or the 20k's, and thanks to Hector at Hydra, added the 4 remaining ATI bulbs to the T5 fixture. I gotta say, the combination looks great, especially with the 20k's! I've never been a super blue tank guy, and so I was worried the 20k's would be too much...but let me tell you, I think it's due to the 48" deep tank, but it's actually very natural looking while making the corals pop. The coloration is really great.
I also couldn't contain myself and have picked up numerous frags at Hydra, and they've been loving life so far.
Photos to be uploaded soon!