Thanks Biggles! Things have changed in the past week. The corals are doing well...and so is the bubble algae, but not in a good way. The Dino's have completely disappeared since changing my RO/DI filter media, which is great news.
The current tank wasn't getting a lot of attention, due to its upstairs location. I couldn't move it downstairs because of the limited space, and my wife thought the configuration was ugly.

I also wanted to change the [coral load:water volume] ration; this would allow me to run Kalkwasser in my ATO at supersaturation. I was almost there, but my Alk would slowly climb.
With that in mind, I downgraded to a 29 gal standard tank with a 10 gallon sump. Most of the equipment stayed the same: Tunze return and streams, BM NAC 5.5 skimmer, titanium heater, Tunze ATO. There is one thing that has changed...
The LIGHT! I went full LED, utilizing my PCB. It's operating with 12 1-up stars that are a mix of Royal blue, blue, green, and Violet. Since my PCB is void of white emitters, the result is too blue. On the plus, my pinks really pop, as well as the usually green and orange. The negative is that my blues and purples are a bit washed out by the blue tone of the light. I'll be switching out for some whites. I'll also be fabricating a reflector for my puck that'll allow it to focus more effectively. This all needs to happen rather quickly, as I'm not sure how the corals will respond to the current configuration. I'm flying by the seat of my pants on this; that's something I hate doing in this hobby. Here's to hoping that I land well.
Today's the tank's 3rd day with the light. The Alkalinity consumption hasn't stopped, but I'm not sure how quickly that would happen. Time will tell...
I'll start a new thread for the 29, once I've situated the corals a bit more.