Ok everyone, i need some advice/help with my frag tank. I am not seeing very good growth. Most corals seem ok but not flourishing like I would have hoped. I am wondering if PH is the problem??? First a little info. Tank is a 45 gal peninsula ( approx 12 inches deep) draining into a 20 gal sump. Filtering with an SCA 302 skimmer (had lying around) and returns with Reef Octopus varios. Using Tunze auto top off. I would say i have a medium flow rate in the tank between the return and the Jebao rw 8 wave maker. Tank is lit with 2 54 watt Aquamaxx Nemo lights on approximately 80 % blues and 30 % whites on an 8hr cycle. I also mounted a Wattshine 180 watt “black” box over one side (about 18 inches above water level) to try and start more light demanding corals. Currently only using the blue channel at about 60 percent. Water Parameters: Salinity 1.027 checked with refractometer Ammonia-0 Nitrite-0 Nitrate 3ppm Phosphate was zero last test but ran out of reagent Calcium 600 Alkalinity-9.9 dkh Magnesium-1350 PH-7.7 I have an airline connected to the skimmer running out a nearby window to help draw in fresh air. I know a lot of people say to not chase Ph but I have to admit it is bugging me. I just did a fairly large water change 2 days ago which raised my Calcium and alkalinity numbers and also my salinity ended up being higher than I planned. I will have the salinity corrected shortly. I have B-Ionic and was planning on beginning the 2 part regimen but I will wait until my alkalinity numbers drop. Coral frags: 1 hammer 1 pagoda cup 1 candy cane 1 pocillopora 3 zoa 1 neon green play 2 gsp 1 photosythnthetic gorgonian 1 hairy mushroom Any suggestions or advice would be appreciated.