Now I am baffled... I generally perform the whole batch of checks once a week or if a parameter appears to be slipping. Since all has been going well yesterday was a day for me to perform all checks. For the most part parameters look good, although I flagged the phosphates because they were at .11. Target is lower. Today it appears that I have another coral starting to recede. I guess the phosphates will need to be lower, and kept there.
Really bums me out, except for a couple bumps in the road all has gone pretty well. This coral has survived the early missteps so it is very disappointing. Making up a fresh batch of water and will do some slow water changes to get phosphates lower. I am going to watch it throughout the day. It has grown a bit, there is enough to frag the frag if it continues to progress.(In my experience it is inevitable once it starts) :(
The only other thing I did was to raise temp to 79 as the summer approaches most likely the tank is going to run warmer and to avoid swings in temperature it might be best to slowly bring it up a bit.