SPS loss of red tips

[speedstar]

I have two Australian coral frags that were green with red tips, one strawberry shortcake like and one another type. Both have turned all green now. They look like a lighter color green now but perhaps not. In general is there a reason for the loss of red? Not enough light color temp etc


Thanks for any thoughts

 

[speedstar]

Also my ATL Christmas tree mir(something)lis does have both the red and green.