SPS Corals turning white at tips, slight brown-ish colors in some tips

[dmoney]

Hi!

Recently out of the blue my SPS corals are turning white, and some of them have a reddish-brown color. Not sure what is causing issues, some stats are:
Temperature: 79.3 F
NO3: 13-12
pH: 8.2
PO4: 0.07

 

[Epic Aquaculture]

Hi!

Recently out of the blue my SPS corals are turning white, and some of them have a reddish-brown color. Not sure what is causing issues, some stats are:
Temperature: 79.3 F
NO3: 13-12
pH: 8.2
PO4: 0.07

Those are dead or dying. The redish brown stuff is algae. How old is the tank? what is your Alk at? what is your CA at? What PAR are the frags under?

 

[harrylarry]

Ya they are all dead and growing algae

 

[gbroadbridge]

To add to what other are asking - what is your Salinity, and how are you measuring it?

 

[zheka757]

Yeah, sorry for bad news but I'm looking at basically dead frags. Not all, but ones that turn white,

 

[Dburr1014]

Hi!

Recently out of the blue my SPS corals are turning white, and some of them have a reddish-brown color. Not sure what is causing issues, some stats are:
Temperature: 79.3 F
NO3: 13-12
pH: 8.2
PO4: 0.07

Need a lot more info to help.

Lights? Par? Schedual?
Flow? All parameters? Test kits?
SG? How are you checking and calibrating?
Age of tank? How was started?

Full tank shot would also be helpful.

Right off the bat I'm going to guess this is an older tank but new to SPS. either lights, sg, or nutrients.

 

[dmoney]

Thanks so much for all of the helpful replies! I didn't think there would be so many responses, and am so grateful. I actually created this post for a non-English-speaking relative who isn't sure how to use the internet, so I asked him today a bit more to get all the necessary info. I didn't know anything about the units (but they are prob the standard values) and I got numbers for most of the requested stats. One thing to note is that there is also LPS coral in the tank which is completely fine, and "ROWAphos" is used as phosphate removal for the aquarium.

Some more requested stats are:
Alk: 8.6-8.9
Par: 360-410
Ca: 420-430
Mg: 1320-1350
Salinity: 1.025 (HANNA salinity tester)
Nitrate: 11-13
Phosphate: 0.05-0.07
Tank has been around for 6 months
225 gallons
Light: 3x Radion G6, 4x T5 lights, AB+ lighting

Is there anything that should be done? What should next steps be?

Full tank picture:

 

[Dburr1014]

Numbers all look good.
Is this a dry rock startup?

 

[dadnjesse]

Are those Radion's XR15 or XR30. If the 15's that's not enough light. have you tested the Par with a good Par meter? From the Picture it looks like a deep tank.

 

[Mwatts12]

@dmoney I have radions: 6 xr 15 and 2 xr30

My tank is 20 inches deep. I run ab+ lights at 100%. I don’t light acclimate acros. Get them in mail, glue to rock under a ton of par.

 

[Hurricane Aquatics]

Your problem is 410 PAR with very low nutrients and probably very little flow.

Also, if the PO4 is really as low as you posted, why use Rowaphos? It's stripping your nutrients and you have high par which is a recipe for disaster. Get rid of the Rowaphos all together.

The SPS are expelling their zooxanthellae which means they are under extreme stress.