well lemme see tank pics first, if you are feeding that well and im just seeing about the tang, nice secondary coral feeding from that as well, you may not need a big change. the pics help so much by giving us unspoken variables aside from the testing specifics
I had posed the idea of fully resetting your water table back to any saltwater brands initial makeup, they are all ok for corals its how they vary in time that matters. even the cheapest salt IO runs many sps and lps tanks so I know any mix is ok for yours. if there was an accumulated something, a full change out removes it without tediously testing for it all but im curious to see pics there are already some outliers on the tank pics w help
I had posed the idea of fully resetting your water table back to any saltwater brands initial makeup, they are all ok for corals its how they vary in time that matters. even the cheapest salt IO runs many sps and lps tanks so I know any mix is ok for yours. if there was an accumulated something, a full change out removes it without tediously testing for it all but im curious to see pics there are already some outliers on the tank pics w help