Hollywood Stunner edges turning white

[reefer1970]

(3) frags in tank 45 days, one up high, one mid and one down low. All turning white around edges.

125g mixed reef
kessil 360's and T5 controlled by APEX
yesterday I started slowly dosing, calcium, alk, mag. (they were all slightly low)
Also added Brightwell amino acid

Ph 8.1
80*
Salinity 1.024
Ammonia, Nitrite, Nitrate all 0
Phosphate really high (1ppm) I did a 20g WC 2 days ago before I noticed edges

Anything sound like the cause and when they start turning white, is that a death sentence? should I frag off the white part?

Thanks in advance

 

[jbvdhp]

What's ur ca alk and mag at? You say low, but what?

 

[reefer1970]

Oh crap, guess I forgot those

400
7.3
1170

brought them up to

420
8.2
1290 (will add more)

and started adding Kalk

I only noticed the white edges after adding the supplements but wouldn't expect such a fast change. The stunner did seem a little softer or fragile when I moved it recently and I thought maybe it needed calcium

 

[jbvdhp]

Hollywood Stunner edges turning white

When I had low magnesium and calcium I was having issues with LPS left and right.

When you say white, is it losing tissue or white around the perimeter for a few millimeters? The latter is growth and HS grows incredibly fast.

 

[reefer1970]

Sadly, no it's dying inwards from the outside rim. Getting thinner and whiter. Three different, 3" frags in different areas of the tank. I think I might have too much light even though I acclimated everything. (3) Kessil 360's 12 hr/day + I added 4 54 watt T5's 3 hrs/day to supplement. Just lowered to 1 1/2 hrs midday. Any thoughts?

 

[Stratos295prelt]

I have had two evergrow leds on my tank, everything was doing great, put 4 54w T5, actinics, because i wanted more blue color, two days later several SPS started to turn white on the edegs especially my monti. i would say to much light