This is great to hear. I've mentioned this in so many threads it seems like I'm a broken record (if in fact anyone even remembers what a record is). Anyway, I think too many people get hung up on the word "nutrients". We've come to believe nutrients are bad, when in fact they are the building blocks of full nutrition. In the wild, the reefs are nutrient rich and dissolved organic compound poor. The water is teeming with planktonic life that is available to feed corals and fish all day long. In our tanks, this simply cannot be, and would crash our tanks if we attempted to make it so.
People test for nitrates and see they can read them on their kit, and panic. After looking at so many TOTM tanks, it would appear that those who have extremely bright and powerful lighting and long photoperiods have measurable nitrates and phosphates in the water. Those who have great color with no measurable nitrate and phosphate seem to find a sweet spot with a much shorter photoperiod. Within reason, the longer you light 'em up, the more nutrients seem to be necessary to color them up and help them grow, and vice versa. This makes perfect sense. It would be akin to riding in the tour de France and not expecting to eat on the bike or get water and Gatorade refills to replenish your exerted energy stores. Photosynthesis requires energy as well. This is purely my opinion and observation, but I've stopped considering it a coincidence. When someone says they feed heavily and have 0 nitrates and phosphates you need to take it with a (pun intended) grain of salt. Ask exactly what they feed, how much and how often and you may be surprised that it wouldn't be considered heavy feeding at all to someone else. I've only got 7 fish in a 195 tank (Achilles tang, Tomato Clown, 2 Anthias, Yellow Tail Blue Devil, Bellus Angel and Leopard Wrasse. I run a Bubble King Supermarin 200 skimmer, change 25 gallons of water weekly, run carbon and gfo in a reactor and stir the sand bed and wipe the glass every couple of days. I have some algae on my rocks here and there, and my SPS didn't look good until I got my nitrates around 5 ppm and phosphates between .03 - .06. I have approximately 120 pounds of live rock and feed a cube of mysis, brine, half teaspoon of NLS pellets and a 2 inch nori square to the Achilles every other day. I also dose 4 drops of Brightwell's coral aminos and a drop of Lugol's solution every day for my water volume. I shop vac the sump clean and have what most would consider an understocked and "clean" system, however my water parameters read what most would call "dirty". Unless you're running ULNS and dosing all sorts or additives, keeping some dirt in the water seems to do the trick for me in coloring up the SPS and getting better polyp extension, especially if you run your lights long like I do (13 hours supplemental, and 7 hours for 3 250 watt Radiums in Lumenmax Elite reflectors on Galaxy Select a Watt ballasts).
Lastly, be very conservative with introducing coral foods to your tank. At first this may seem like a great idea, but they are extremely rich in phosphates. I've achieved the same results by just feeding the fish when they're hungry. As my corals grow out and have more polyps to feed, I may add OysterFeast back to my regimen. Just take it slow.