I only have softies for now because of my lighting, I only have 260-watts of PCâ€™s. I noticed in the last few days that my Mushrooms & Button Polyps seem to be shrinking & not opening up that much. My Ca is a little low at 370 but the other parameters seem good. NH4, NO2, NO3, all â€œ0â€ PO4 0.03, Alk 3.89 meq/L, PH 8.3, SG 1.024, Temp 78degrees. Would the low Ca cause the polyps & mushrooms to shrink up? Or should I be looking for something else?