This is a bit late, but fwiw.
My tank is a 12" cube, SPS tank, with 15 gallon sump, with a bubble magus nac3.5. The tank is bare bottom. Water depth is 10" with tons of flow. Koralia 240, and a rio 6hf return. I run a carbon bag, and vodka dose. Supplementation is 2 Part Bi-Onic, and Red Sea 3 part, but I only use the Mag, to Red Sea regular salt and RODI. I also spot feed aminos(Red Sea). There isn't a fuge on this tank, just a few pounds of rubble in the sump, and a sock, along with the carbon bag, heater, skimmer and return pump.
Parameters are a bit odd, but stable.
Mag1380(Red Sea pro)
Ca 420(Red Sea Pro)
Dkh 8(Red Sea Pro)
Nitrate .25(Red Sea low range)
Po4 .23(Hana)
SG 1.026
Water changes are 6 gallons weekly.
Livestock:
Line spot Flasher
Springeri Dottyback
Lemon Peel Chromis
Mermaids:
1 turbo snail
3 Trochus Snails
Handful of Stomatella Snails
This tank has been running for a year, and has one AI Nano, on the arm, which was modified so the light would hang centered on the tank.
When the corals were first placed into the tank, they were already browned out. Light settings were first set for an 8 hour period. R ramp up for 90 minutes, B begin to ramp an hour after, then W an hour after, to reverse the sequence for ramp down.
I initiated the light settings for a 3 week period, R35, B28, W17. Corals were still brown, but polyp extension
I bumped the blues up 5% every month for 6 months, and the whites 3% for 3 months. Where everything finally started to color, polyp extension was pretty good, and corals were basing over plugs very well.
Having not seen much growth after basing, I decided to bump things up, majorly. I ran the Royals at 90%, Blue at 80%, but bumped White at 27%.
Colors began to intensify on most all coral, except for a couple. Polyp extension was through the roof. But still lacking in growth.
2 weeks ago, I went for the Hail Mary. Royals at 100, Blue at 100, whites at 35. I have crazy polyp extension, the not so colored corals are starting to show more color, and am just waiting out growth. I have noticed I need to clean the glass more often with the whites bumped up, cleaning the glass on this tank is tough due to it's size, and the amount of coral I have.
I'll bump the whites another 5% every month until coloring, polyp extension, are maintained, and growth becomes apparent.