So sahin, what are your suggestions
The tank is still relatively new. About 7 months since rocks went into the display right?
So do the following for 3 months solid and see if it makes a difference:
1. Keep PARAMETERS STABLE. I mean ROCK SOLID. Test Alk every 2 days if you have to...Get it stable, as well as Ca and Mg.
2. Feed fish well.
3. Manage algae by using as many CUC crew as required; with a mixture of snails and Hermits etc.
4. Dont go overboard on GFO and GAC, but try to keep PO4 lower than 0.05ppm for the moment.
5. Dont move the corals too much, dont play with the rockwork and keep hands out of the tank.
6. Carry out weekly 10% water changes.
With the above and as the tank matures colours will return to the SPS corals.
There is something about a mature tank that is much more forgiving and with stable parameters can colour up SPS corals much easier. Some tanks get there faster than others. It took my tank well over a year to get to that point. My previous setup (same equipment/tank etc: I restarted) only took about 9 months to start pulling nice colours. Only difference is the liverocks.
You are also running LED's which IMHO makes it slightly harder to pull colours than T5 or MH. Not saying your lights are bad; however I would try and copy light profile which you KNOW is working well for someone else.
With T5's and MH its simply place over your tank and be done. With LED;s there are channels and intensity which brings in so many variables...
So just enjoy the tank for what it is now whilst doing the above, and in time you will see results.
