Why's my SPS bleaching and RTNing?

[Nemo Niblets]

My nanocube 28 has been going steady for a while now. Perfect parameters for the past 2 months, with SPS the whole time. I was running a 250w sunpod with a 20k EVC, and everything was doing great. The ballast crapped out (Lucky me) and I had to order a new light. The tank went without light for a day, and then I put a 150w sunpod with a 14k phoenix over it. Everything's mad...

So I have had one pink birdsnest , and an unknown acro RTN on me. Now I have a pink montipora digitata and a purple montipora digitata bleaching. Everything else is fine... my monti caps, my milleporas, my pink lemonade...

I HAVE NO CLUE WHY THEY ARE DYING.

My parameters are..
Temperature: Dead steady 78
SG: 1.025
Nitrates:0-3
Phosphate: 0
Calcium: 420
Alkalinity: 8.6
Magnesium: 1250

1 week ago the Calcium was 410, the alkalinity was 7.9, and the magnesium was 1200. The only difference is the lighting. Also, I turned the flow up on my Vortech MP10. What did I do?

Pink monti digitata

Purple Monti digitata

FTS The acro that RTN'ed is on the front right near the ricordeas. THe birdsnest is above it. The purple digitata is above the birdsnest. Could it be too much flow? That wouldn't explain why the entire digitata is bleached though.

 

[parkavenuereef]

My nanocube 28 has been going steady for a while now. Perfect parameters for the past 2 months, with SPS the whole time. I was running a 250w sunpod with a 20k EVC, and everything was doing great. The ballast crapped out (Lucky me) and I had to order a new light. The tank went without light for a day, and then I put a 150w sunpod with a 14k phoenix over it. Everything's mad...

So I have had one pink birdsnest , and an unknown acro RTN on me. Now I have a pink montipora digitata and a purple montipora digitata bleaching. Everything else is fine... my monti caps, my milleporas, my pink lemonade...

I HAVE NO CLUE WHY THEY ARE DYING.

My parameters are..
Temperature: Dead steady 78
SG: 1.025
Nitrates:0-3
Phosphate: 0
Calcium: 420
Alkalinity: 8.6
Magnesium: 1250

1 week ago the Calcium was 410, the alkalinity was 7.9, and the magnesium was 1200. The only difference is the lighting. Also, I turned the flow up on my Vortech MP10. What did I do?

Pink monti digitata

Purple Monti digitata

FTS The acro that RTN'ed is on the front right near the ricordeas. THe birdsnest is above it. The purple digitata is above the birdsnest. Could it be too much flow? That wouldn't explain why the entire digitata is bleached though.

I would say WAY to much flow in the specific spot..

 

[Nemo Niblets]

I would say WAY to much flow in the specific spot..

Why do you say that? Would it have bleached the entire coral? The flow isn't that much...

 

[saltygeek]

I posted in your nano thread but to all the SPSers. Do you think there is more par in the 150watt 14k phoenix compared to the 250 watt EVC 20k?
Seems unlikely but if thats the case that would bleach them.

 

[Nemo Niblets]

I posted in your nano thread but to all the SPSers. Do you think there is more par in the 150watt 14k phoenix compared to the 250 watt EVC 20k?
Seems unlikely but if thats the case that would bleach them.

Same exact reflector, so I doubt it..

 

[coralpimp2009]

???

???

I think from my experience you'll never get that answer that will satisfy your question.
I just had the same thing happen to a nice blue stag colony and a tort mini colony. Current wasn't an issue water parameters were perfect, the infected colonies look perfect-polyps extended feeding as the 2 slowly died back over 2 days before they were gone.
Just accept knowing if everything checks out parameter wise that this hobby does throw you a curveball every once in a while and it just might have been time for these corals to go to that big reef in the sky..lol
let them R.I.P. If all others are still doing good, it sucks to see the others go but I wouldn't worry bout it.

Check for stray voltage tho, heaters are good for shocking corals when they go bad!