Without trying to sound argumentative myself -- I want to emphasize that you're asking for help, and arguing with everyone who's trying to help you. This is a surefire way to ensure nobody ever helps you. I understand where you're coming from completely, so I'm not trying to judge or argue either! I'd be pretty annoyed if I were in your situation myself.
Triton Testing is worth doing once for sure -- Dave (o2manyfish) has spoken at my club meeting about them and they've discovered all types of things that have helped reefers with problems, from very uncommon and esoteric minerals missing in their systems, to rusty powerhead parts that are messing with water params. Not only that, but they will custom design nutrient packs specifically hand built for you and your aquarium.. It's a top tier service, it's not cheap, but with all the money we invest it's so worth it..
About your lights -- You
might get better results adding in a few ATI Blue Plus bulbs. They have great PAR/PUR, and are at a great spectrum for corals. The ATI Coral Plus is also a great bulb. Both of these bulbs have been shown to greatly help SPS corals with color, growth, and fluorescence. DD bulbs might be perfectly fine, they might even be great.. but there's soo many great reviews from reefers using ATI, I'd think a few bulbs when you next replace your lights is a worthy investment.
Taking off your glass lids -- might solve your problem
There are a great many things that were unaware of in actual SW -- I'm aware most experts could easily retort this on paper, but I've yet to see a single one of them have a good looking reef at home, or in a lab. I'd be weary of chasing any NSW specifics by themselves as we don't have an ocean, we have an aquarium. There's a plethora of unaccounted organics and microfauna we are probably completely unaware of. It's also very likely that we can't replicate these conditions in the home environment.
Compared to our own aquarium environment for example -- A Phosphate of 0, doesn't mean there isn't phosphate in the system or ocean. It means there isn't
excess phosphate. The actual amount of phosphates and nitrates being consumed in a reef must be
staggering to support that level of life. The numbers in actual reefs are impossible to get in home aquaria. Another good example would be PAR. Typically on reefs in the ocean PAR is significantly higher than we can get in home aquaria, and getting near these numbers would absolutely nuke our home aquarium.
This will sound counter intuitive, and completely *** backwards -- But I've not seen many good results from trying to replicate true NSW levels
across the board, and falling strictly on Biology (this coming from a student who LOVES biology...) The best SPS guru's here are typically far and away from NSW levels in
some area or another.
Here's a list of amazing SPS guru's that fly in the face of Biology
Biggles for example has ASTOUNDING color and growth. One of the ways he achieves this is dosing copper which makes corals expel their Zooxanthellae. My entire life I've been told copper in even the smallest quantity will decimate and destroy reefs. That is very likely true in the ocean (Zooxanthellae protect corals from high sunlight), but completely untrue in home aquaria unless you reach
extremely high levels.
Here's a thread with successful reefers dosing nitrates -- All of whom have noted exceptional results in growth, and color.
Here's a guy on another forum who keeps his Nitrates around 40 and Phosphates at .03 - .07 (This is his "im learning how to use my new camera" thread -- His growth and colors are astounding, though his camera work is still obviously developing)
Here's Dave (o2manyfish) and his high phosphate tank -- He works at and designs the systems at a little shop called Unique Corals (His phosphates were .32 in this post -- Not a typo)
What about high end boutique corals like Reef Raft? -- Well Reef Raft california is right down the street from me. I can walk in, check out $1000 colonies and shoot the breeze with top tier coral growers. The RR California distributor / grower / aquaculture guru was telling me he saw some great improvements by dosing nitrates. They like to keep their no3 at 10 nowadays.
So I feel where you're coming from, I do.. But all of these guys I listed aren't some Joe Schmoe down the street. They're top growers on the private & professional level who have astounding and absolutely noteworthy results. And all of them have achieved this by doing things that don't come naturally in the reef environment.
I really hope this helps man! I'd like to see this turn around and get some great colorful shots in the future.