I am relatively new to reefing. I started my 30 gallon tank early May of 2014. I do a 5 gallon water change every week and I use reef crystal salt. have about 5 nano zoas and a couple are always open and 2 are not. I also have a couple duncans that open huge than close also. I have a reef Breeders Led that I have on all the time. Half the day the night and day are on and half the day just night is on. What am I doing wrong? The fish are healthy. I also have GFO and Carbon in two small reactors going.