Bleached corals

[LFGJP]

Sounds like to me; big tank, small lights.

Pics would be helpful. Also need more context. What's your maintinance? Filtration?

SG is slightly high.

How old is this tank?

How do you keep mp10's on the glass of a 210???

I do water changes once every 2 weeks about 10%
Tank is about 2 years old
lol I don’t know but the MP10s stick on there pretty well

 

[LFGJP]

Not sure I wrote an article, but rtn and stn are symptoms, not an illness, imo. Bleaching is different as the coral is still alive but white. Dimming the lights and increasing flow with bleached coral has helped me recover them. Stn and rtn are usually caused by many factors, and sometimes it happens without an explainable cause. In those cases, I frag the healthy tissue about 1/8” above the dead area, and remount the frag. That’s been about a 50/50 success rate for me.

I’ll try that it’s pretty much all bleached out so not much to frag. I’ll just try that with a few that’s hanging on..
Most of them were doing just fine until about a week ago I saw their tissues receding little by little, so I ordered the ICP test
Most of the frags have been in there for a few months doing just fine
I test pretty religiously and count see much fluctuation on the things I tested (DKH, Phos, nitrate, calcium)
I just don’t want to buy new corals and have them bleach

I do have monti’s birdsnest and other easier SPS that are doing fine just the ones I spent money on are dying

 

[Reefer Matt]

I’ll try that it’s pretty much all bleached out so not much to frag. I’ll just try that with a few that’s hanging on..
Most of them were doing just fine until about a week ago I saw their tissues receding little by little, so I ordered the ICP test
Most of the frags have been in there for a few months doing just fine
I test pretty religiously and count see much fluctuation on the things I tested (DKH, Phos, nitrate, calcium)
I just don’t want to buy new corals and have them bleach

I do have monti’s birdsnest and other easier SPS that are doing fine just the ones I spent money on are dying

Are the polyps out and just white, or is the coral dead (no polyps or tissue) at the white spots?

 

[Dburr1014]

I do have monti’s birdsnest and other easier SPS that are doing fine just the ones I spent money on are dying

Do you know the par from one's doing good and one's doing bad?

I had trouble keeps a mp10 on a 75 gallon(thin glass)

 

[LFGJP]

Do you know the par from one's doing good and one's doing bad?

I had trouble keeps a mp10 on a 75 gallon(thin glass)

I don’t know the par numbers but they are scattered middle to higher in the tank
I have a few sps on the bottom with same results

Haha! I didn’t know I was so lucky to have the mp10s sticking
I had one that just would not stay on but they are all on there and have been for as long as tank has been up

 

[LFGJP]

Are the polyps out and just white, or is the coral dead (no polyps or tissue) at the white spots?

I’ll send the pictures later once I’m home
It’s all bleached now but

Are the polyps out and just white, or is the coral dead (no polyps or tissue) at the white spots?

Coral is dead no polyps