My 16 gallon reef has been stable for the longest time, until I got bubble algae and started to increased my water changes which got to a point where my nutrients were too low and now I have dinos. I had dinos about three weeks before I decided to do a blackout and all of my coral was fine, but I wasn't doing much to take action. A few days ago I decided to start taking action with a three day blackout which resulted in half of my frogspawn either dying or not opening up from the blackout period. Is this normal? All of my other coral including acros and torches are fine except this one. Will it open up again in a few days or is it a goner? I have no idea what caused this. The only time I ever lost a coral was once almost a year ago. It's strange because half of the frogspawn is open, but now I'm worried that it's going to completely die. I've had this frogspawn for months and it grew quite a bit. I also still have the dinos and ordered dr tims waste away and a small uv sterilizer