125 gal tank. (2)175 watt 10,000k MH. Salinity 1.23, CA 375, ALK. 2.97, low nitrate test 1 (was not able to do med. test so could be a little higher) pH 8.2, no phosphate. I did remove 2 red tree sponges that looked bad a couple of days ago. They were right next to the rock.