Interessing observation. I noticed that when the coral is stressed is when it starts developing reds.
I acquired a green frag some time ago. My frag grew to multi branched over 6 month and still green. I had some issues with stability especially low ph and nitrate and phosphate being elevated. That's when I noticed the polipes of the acro retracted and didnt.look good.
I ramped up water changes and added kalkwasser and the tank went back to normal. Guess what? I started seeing red streaks on the Rainbow splice.
Don't know if its random or the change in parameters made the color appear.
I cut that part where it spliced and will let that grow:
I acquired a green frag some time ago. My frag grew to multi branched over 6 month and still green. I had some issues with stability especially low ph and nitrate and phosphate being elevated. That's when I noticed the polipes of the acro retracted and didnt.look good.
I ramped up water changes and added kalkwasser and the tank went back to normal. Guess what? I started seeing red streaks on the Rainbow splice.
Don't know if its random or the change in parameters made the color appear.
I cut that part where it spliced and will let that grow:

