Multi-colored corals all turning green!!!

Aquatic Bobs · Mar 16, 2019

Okay so I have read several responses and articles but I still can't really get a straight answer why some of my multicolored corals are turning all green. I've heard that too much blue light can cause it and then other people say that's not true, I have to AI Hydra 26 lights over my 75 gallon mixed reef tank. UV's and violets are both at 118%. Royal blue at 86%, light blues at 87%, greens at 4%, reds at 9%, and cool whites are at 29%. Lights run from 09:30am to 10:00 pm with 1 hour ramp up and down at the beginning and end of those times so lights are on for a total of 12 and 1/2 hours each day.
Temp 79.4
Phosphates 0.15
Nitrates 5
Nitrite 0
Ammonia 0
Alk 10.5
Mag 1385
Cal 460
I use Instant Ocean reef crystals with a Jebao dp-4 dosing pump which keeps all my levels pretty stable and I have a gfo reactor. I do not have a sump setup yet and I'm not currently using any type of macroalgae. 55 to 60 lbs live rock.
1 yellow tang
3 blue green chromis
1 firefish
1 flame angel
1 yellow tail blue damsel
1 scooter blenny
1 six line dressed
13 snails (assorted)
7 hermit crabs (assorted)
3 emerald crabs
1 cleaner shrimp
1 feather duster
Tank is 4 and 1/2 months old

It's a little hard to tell in these pictures which I took from my phone but when I got the corals they weren't mostly green like they're turning into now.

ndrwater · Mar 16, 2019

Corals colors are directly affected by their surroundings. Coral colors do indeed change. Sometimes for the good, sometimes for the bad. With time, the desired colors may come back.
Looking at your parameters, they are all in check, but... Recently people have found that a bit more Nitrate and a tad more phosphates helps with Coral colors.