What happened?

[MelbourneReefer]

Purchased this Tyree LE Montipora undada and I placed it on the bottom of the tank on its side just to acclimate it and I noticed now three days later it is white all around the edges so I moved down to the sand bed is this from lack of light?

 

[Centurio]

Doubtful it's from lack of light in three days. More likely something's off in the water.

 

[nashorn]

or too much light since the good side seem to be shaded ? cant tell from pic
also what's your water param?

 

[MelbourneReefer]

For some reason I have extremely low alkalinity it’s 7.4 not really sure how to raise it without going too much at once I have never dosed but I have two part B ionic

 

[Centurio]

7.4 isn't extremely low. I know some reefers with SPS dominant tanks that prefer to keep theirs around that for more color (but slower growth.) If it wasn't acclimated properly and came from a higher Alk tank then that could cause it - but so could many other things. We would need more info to even take a stab at it. Lights, tank parameters, etc