PH change killing corals?

[cluanar]

So I noticed my zao's and hammer started pulliug in and after a check i saw my ph was at 7 so i added kalkwasser per instructions and checked the next day and my ph was 8.8. I have since completed a 25% water change and now its back to 8.2.

Nitrate .5
Nitrite 0
calcium 460
alk 11 dkh
ph 8.2
ammonia 0
phosphates 0
added salinity 1.26

I dont have mag test kit.

90 gal reef

5 or so frags of zao
1 hammer
6 reef fish ( smaller size )
2 mushrooms ( frag size )

I am not good with names of corals but a larger colony that looks like grass waving :)

2 AI vega ( 4 pucks each ) lights 10 in awl 33 in to sand

I am wondering if my lights can be better. I see many setting whites to 50-70% and blues to 90%. If i set my whites to 30% and blues over 40% I can barely look at it without sun glasses.

Ideas?

 

[Ranjib]

Can be, but I think the alkalinity will be a bigger concern. They should recover none the less if you get back the water Chemistry in proper range

 

[cluanar]

Can be, but I think the alkalinity will be a bigger concern. They should recover none the less if you get back the water Chemistry in proper range

Do you see anything out of line here?

 

[Ranjib]

ph and ca is high. rule of thumb is to never chase ph unless you are certain thats what need fixing. ill suggest doing 10% water change at 2 days interval for two consecutive times and then check back.

 

[cluanar]

ph and ca is high. rule of thumb is to never chase ph unless you are certain thats what need fixing. ill suggest doing 10% water change at 2 days interval for two consecutive times and then check back.

Do you think ph of 8.2 is high? my target was between 8.2 and 8.4

 

[Ranjib]

Do you think ph of 8.2 is high? my target was between 8.2 and 8.4

its not too high for sps, but for acans and zoas it might be bit high