Rickyrooz1
Acropora Nut
I usually keep my 120g's salinity at 1.026, KH at 7.0, Calcium at 420 and Magnesium at 1350. I went away for a week but before I left the salinity was at 1.030 so I took out some water and added fresh R/O water. When I came home the SG was at 1.022 and the KH was 7.7, Ca was 370 and Mg was 1050! My Purple Tri-Color turned brown and two of my green acro's started to lose tissue. Could this have been caused by bad alkalinity values or a low levels of Ca and Mg or because the salinity dropped?