coral issues need help

[Groovyg]

Ok reefers been have alittle issue with a few coral tissue losses not sure whats going on.
100 gallon dt
temp 78
34ppt
po4 .04
no3 10-15
mag1450
cal 420
alk 12 had a one day swing to 13 week ago
rodi water test 10 tds in mixing bucket
dosing
AFR 10ml p/day
bw7 20ml p/day
nopox 5ml p/day add to schedule 3 weeks ago

no change in lighting schedule

i did add 15lbs of carbisea life rock after a good washing in rodi water pump

 

[blaxsun]

Your alkalinity is high (7-11 is ideal), and if you're hitting 13 that could definitely be an underlying cause. The other water parameters look fine. I'd probably cut back on your alkalinity dosing to get this a bit lower and you may want to increase your salinity a bit (34.5-35.0).

 

[Groovyg]

Your alkalinity is high (7-11 is ideal), and if you're hitting 13 that could definitely be an underlying cause. The other water parameters look fine. I'd probably cut back on your alkalinity dosing to get this a bit lower and you may want to increase your salinity a bit (34.5-35.0).

agreed i gonna let it drop to 10 been running 12 for a while see no benefits