well i just did my giant water change,30 out of 45 gallons using coralife salt,and i added 20 ounces of bulk reef supply magnesium because my red sea test kit said that the NSW was @900ppm. the reef chart on the BRS web site said i need to ad 40 ounces. but i think i will give it some time and maybe get an elos mag kit before i go crazy with the MAG. please take a look at the pics and tell me what you think,what i should change,what you like,ect....