WHy is it some days corals just decide to look crappy, like not fully expanding, my do this once in a while particulary the green star polyps and a sunflower. My alk is at 3.4 calcium is 450, ph 8.2, phosphates 0.1 and nitrates 10 , salinity at 1.023 and temp at 80. Could it be they just have bad days just like the rest of us.