SPS issue..

[Bwow]

Hey everyone,

I'm at a loss here at what could be causing this..

The past few weeks my SPS have been peeling off.. Literally within a few days they're gone..

My torches are fine, my hammers are good.. Zoas not a problem..

I've done a water change and no success.

Alk has been steady around 10.11-10.23
Calcium steady around 418-425
Magnesium doesn't move from 1440 to 1460..
Salinity as 35ppt as per apex..

No3 between 8.8 and 10.2
Po4 beet 0.03 and 0.1

I dose nopox and red sea ab+, and reefroids..

Any input is appreciated as I've never had this happen before..

Pic included for idea..

 

[FrugalReefer]

How old is your tank? I'd lower your alk to around 8.0.

 

[slogan315]

Hmm, numbers look good. Any flow changes recently. Also how confident are you in the salinity measurement? Are they peeling from the base, tips, shaded spots?

 

[Bwow]

Hmm, numbers look good. Any flow changes recently. Also how confident are you in the salinity measurement? Are they peeling from the base, tips, shaded spots?

I measured salinity with refractometer and apex probe.
It's peeling from both base and branches.

How old is your tank? I'd lower your alk to around 8.0.

2 years.. Always had it at 10ish but will try lowering it to 9.. And then 8..

 

[slogan315]

10ish alk seems fine considering you have enough nutrients, and assuming you have enough flow. Tip burn usually indicates high alk and lack of nutrients, or blasting flow. Base peeling usually indicates low phosphates or pests.

Assuming flow is good and tests are correct, maybe a bacterial issue?

 

[Bwow]

I'm leaning that way too as everything else is fine - I'll try lowering alk a bit, and see if I can spot any changes... Appreciate the help