ok Thats works for you. Go on reefs hack and read this The Ultimate Guide How To Successfully Grow Beautiful SPS Corals. low phos and nitrate causes color lose and sometimes bleaching due sps starving . My tank parameters Alk 7.7-8.0 cal 420 mg 1350 - 1400 salinity at 35 ppt. phos 0.2-05 nitrate 0.2-05. All corals doing great great corals. Been reefing for 22 years. was just trying to help.I run my tank at 1.028 for years. To each their own.