I can't say how quickly it happened, but within the past week for sure. It's a coral in the back of the rock work that can only be viewed from the far side of the tank, so it doesn't get viewed that often.
my params are....
Specific Gravity - 1.025
Mg - 1220ppm
Ca - 390ppm
kH - 10.9
No3 - .145
Po4 - .06I
It is water change day too, the bucket is mixing.
I'm also looking to get some input on my algae problem, should I just discuss it here or bother making a new thread?