A few of my zoas have started not opening up very good. Nothing's changed into tank but I have been dosing Nualgi to try and help out with some hair algae I'm having. Amm, Nitrite and Nitrates are all 0. Calcium is 480. Alk is around 10 to 10.5. Mag is way high. Higher than my test can read at 1600. It's always been like this though.