Poprocks acro dying

[MNFish]

This morning this frag looked fine tonight it looks like this:

Fresh test consistent with usual at:

Salinity 1.025
Temp 79
PH 8.5 Hanna checker runs high
Alk 9.5
Mag 1600 fritz salt is way to high here
CA 450
Nitrate 7.5
Phosphate 0

No changes to lighting
Other coral fine
Been in tank about 3 weeks.

Run chemipure blue

I know this happens sometimes but wanted to throw this out for a second set of eyes or for suggestions of other things to check as this is the first Arco I have lost in a long time.

Thank you

 

[MNFish]

It is about 16 inches under a kessil ap700, maybe I cooked it?

 

[MNFish]

I dose 2 part with sodium bicarbonate instead of soda ash as ph runs on the high side.

 

[xshmoox]

My guess is your lack of po4 . I lost a pop rocks frag that way my nutrients bottomed out. I’d pull that chemipure

 

[MNFish]

My guess is your lack of po4 . I lost a pop rocks frag that way my nutrients bottomed out. I’d pull that chemipure

I just added a new bag 2 days ago I will pull it and observe thank you.

 

[happyhourhero]

Yeah 0 phosphate is my guess too.