Can adding Mg or raising Alk make sps tips turn Flourecent green?

[Trigger Man]

Tang Daddy,
I have not changed bulbs since May but did add 2 Glo t5's to the display a month ago. I figure it is the addition of Mg that may have caused the change, but the tank is still looking good so I will go with the flourecent green growth tips being of no concern until I see a reason to think differently.

[fiorano]

i have noticed this as well. almost everytime i add a type of sps to my tank it starts turning green at the tips... i dont really understand it