SPS turning deep purple!

[P3FE]

I need help figuring out why my SPS are turning deep purple. My tank is very stable, I'm not dosing anything, I haven't change anything lately, and I don't feed coral, just the fish. LPS are doing fine, I don't know what else to do, Has anyone had this happen to them before?
ALK 8.3
Cal 430
MAG 1250
NO3 2
PO4 0
PH 8
ORP 394
Salinity 34.3
Temp 80.4

 

[clownsrcool]

Which SPS are we talking about?

 

[P3FE]

Which SPS are we talking about?

Acropora

 

[clownsrcool]

I mean which ones specifically? Acropora is a very general term for hundreds of corals.

 

[P3FE]

I mean which ones specifically? Acropora is a very general term for hundreds of corals.

I don't know the names, but one of them was blue, the other one was red and green, and the last one was pink, here are some pics

 

[bct15]

All three if those corals appear to be browned out and dieing. All of them have dead tips and stn'ed bases. One or more of your parameters are off.

 

[P3FE]

All three if those corals appear to be browned out and dieing. All of them have dead tips and stn'ed bases. One or more of your parameters are off.

Parameters are solid, test with Salifert and RedSea, plus LFS, everything is been the same for the past two months, I have other SPS in the tank and they are doing fine

 

[reefwiser]

Do you ever see any Polyp Extension ? I don't see life there. What type of lighting and how did you acclimate the corals to the light? An how long have they been in your tank.

 

[P3FE]

Do you ever see any Polyp Extension ? I don't see life there. What type of lighting and how did you acclimate the corals to the light? An how long have they been in your tank.

They have been in the system for 3 weeks, the polyps we're find until about 4 days ago. I have 4 Radion Pro G3 maxing out to 60% . The tank is 30" deep and par levels were this frags are sitting is 300-310.

 

[Sabellafella]

Wait what type of salt are you using

 

[P3FE]

Wait what type of salt are you using

Tropic Marine BioActive

 

[Diesel]

Check your K and raise your PO4, corals show sign of starving.

 

[Sabellafella]

Oh cause last 2 batches of rscp turned my ssc and jfox champaign completely vibrant blue nd purple nd one of my monti caps gettin pale

 

[Diesel]

I would also raise your MAG a little.
You said that you don't dose anything, is that considered the ALK and CAL too?

 

[SifuMemphis]

If your P04 is truly at zero, it can explain why they are dying. They are starving. Do you know what changed in the last 4 days? Alk swing, Salinity change, etc etc? You stated that they have been in the tank for about 3 weeks, can you let us know how long the tank has been up and running?

 

[P3FE]

Check your K and raise your PO4, corals show sign of starving.

You think I should take the GFO out of line? I've been thinking about that for a couple of days, my system volume is 400 gallons and I've never ran a full load of GFO and now I'm down to one cup and PO4 still reads 0. Do you think that could be my problem? No enough nutrients?

 

[P3FE]

I would also raise your MAG a little.
You said that you don't dose anything, is that considered the ALK and CAL too?

That's righ. This tank is an upgrade from my 60 cube to a 375 and is been up for three months now. I haven't had the need to start dosing ALK, MAG, CAL yet since my levels are rock solid. I test every two days with no change yet. There's not that many corals in there yet, so water changes are keeping everything stable so far.

 

[P3FE]

Here's the tank

 

[P3FE]

If your P04 is truly at zero, it can explain why they are dying. They are starving. Do you know what changed in the last 4 days? Alk swing, Salinity change, etc etc? You stated that they have been in the tank for about 3 weeks, can you let us know how long the tank has been up and running?

The only change I've made was taking the filter socks out about two weeks ago. That's the only thing I've done, I'm very OCD so I have a log of every change, parameters and anything I do to the tank so I make sure I can go back and check specifically for things like this.

 

[Diesel]

I would reduce the flow through your GFO reactor for sure.
Your tank is still very young, if you think that when your tank is cycled it doesn't mean it's mature enough for corals especially SPS.
Most large tank take a bit longer on that but than again I've seen some that put in SPS after a month and with no draw back.
You never know of course, but in your case I would ease off on the corals a bit and let the tank mature a bit more.
Tell us your livestock and show a picture of the sump.