ok this has not been my week. i can home tonight and found i have a problem with my frogspawn coral. The best way to describe it is it looks like it exploded all that is left is the hard base and a gelatin like goo on top. Any idea what may have happen it was fine last night I haven't checked water perameters yet today but the other day it was amonia 0 nitrite 0 nitrate 20 ppm (i have been fighting with this one ever since i set up the tank 2 yrs ago) spg 1.23, alk normal ph around 8.3 any ideas would be great