All frags dying!

Day and moon? Day I had on 11 hours, moon all night

Can you elaborate on moon? With two channels, you have blue and white. The blues arent moon, they're diodes peaking in the 450nm range and should not be used as moon lighting. So to answer the question, yes, both should be on for 8-12 hours and off the rest of the time.
 
As an aside, they are mostly dead. The frog spawn has barely any flesh left, the sps are bleached bone white, and the rest are turning white and visibly losing flesh. Except the zoa. They are closed, but intact. This is now going to become an autopsy thread.
 
Can you elaborate on moon? With two channels, you have blue and white. The blues arent moon, they're diodes peaking in the 450nm range and should not be used as moon lighting. So to answer the question, yes, both should be on for 8-12 hours and off the rest of the time.

I always thought the blues were moon, not actinic UV spectrum. So I have been running the blue 24/7. But still only on the lowest setting. Is 40hrs enough to completely kill all the coral then?
 
What size is that tank?

You only have 2 small fish with n0 detectable n03 your corals are starving. Get the nitrates up and turn the lights back up
55 gallon. So you think low nitrates are killing them dead in a day and a half? I find that hard to believe.
 
The corals arent "starving" and turning the light up is going the wrong direction.
The lights are completely off at the moment, but I think its gotta be something else. The rate of decay is unbelievable. The frog spawn went from retracted to nearly flesh less in 10 hours.
 
The corals arent "starving" and turning the light up is going the wrong direction.
You are so wrong. Look at the depth of the tank and the height of the light. On the the lowest setting on the light he probably getting 10 to 15 par to the corals. And yes these soft corals are starving

Let’s get experts looking at this #reefsquad
 
It's certainly possible something else is contributing. Typically, when a coral receives too much light it closes up and when not enough, it will open larger than normal.
 
You are so wrong. Look at the depth of the tank and the height of the light. On the the lowest setting on the light he probably getting 10 to 15 par to the corals. And yes these soft corals are starving

Let’s get experts looking at this #reefsquad

We have no idea what the PAR levels are (they may be low), we do know some of the lights have been on constantly since the corals arrived. No coral will die in two days from "starvation." Additionally, the nitrate levels were captured by a kit that isnt known for producing low range results and there are phosphates available.
 
Hmm, 3 days with no lighting and food.

So your tank has been up a few months, you have no algae and no cleanup crew?

Something seems very off here.

Also for reference, here are your PAR numbers according to the website. This is most certainly with all LEDs at 100%

XYAThQp.png
 
I know its anecdotal, but even on 1, this fixture puts out a fair amount of light. I would have to believe over 15 par...that said, there are users with this fixture with beautiful tanks and at higher settings. I was under the impression that low light, even 40 hrs straight of it, should *not* straight up melt a coral.
 
I know its anecdotal, but even on 1, this fixture puts out a fair amount of light. I would have to believe over 15 par...that said, there are users with this fixture with beautiful tanks and at higher settings. I was under the impression that low light, even 40 hrs straight of it, should *not* straight up melt a coral.
I'm not making sense of your posts? 15 par for 40 hours?
 
Hmm, 3 days with no lighting and food.

So your tank has been up a few months, you have no algae and no cleanup crew?

Something seems very off here.

Also for reference, here are your PAR numbers according to the website. This is most certainly with all LEDs at 100%

XYAThQp.png

Thanks for that. I had read it would be a good light for my height and tank size.
It's actually been less than 2 days, not 3.
I had long algae. I manually cleaned it all out. It hasn't really come back too much since then, but there is definitely algae in the tank.
 
At the lowest setting at the bottom of your tank, you might as well be standing over it with a flashlight. You are literally providing no light. Yes you can see light with your eyes, the corals aren't getting what they need. Secondly a believable 0 Nitrates since you have no CUC and no Algae is another indicator.

You might consider poking around in the Chemistry forum stickies that Randy Holmes Farley has posted about Nutrients (nitrates and phosphates), then pop over to the lighting forum and see where people are running their LEDs and approximate par.

With where you have your lights set right now, my bet is if you held a PAR meter above the water, you wouldn't even read 50, so you're not even sustaining the corals there, let alone at the bottom of your tank.
 
I think it’s a new tank. Low nutrients, high alk , low light , lomg acclimation. Most in a new tank will use a tester coral.
And I do agree. Your getting very little light. It’s very high up, white channel only. On 1 it’s not enough light.

It’s a perfect storm.
 
I'm not making sense of your posts? 15 par for 40 hours?
I had the lights running on the lowest setting, actinic for ~40 hrs, ~15 of which were also full spectrum. I don't know the par. Everyone else is guessing 15, 50, etc.

What I would really like to know is: point blank - if not enough light for less than 2 days is provided, would it straight up kill the corals? I hear of ppl in power outages limp through a day or 2 with powerheads and airstones survive...
 
Also, so it doesn't sound like I'm trying to just lecture, I would advise trying an 8-10 hour photo period with 6-8 hour peak at 20-30% intensity as a starting point.
 
@Keroppi in a situation where you've just introduced new corals into a system, acclimated them a little too long and already stressed the ba-jezus out of them, then gave them no light and not enough NO3, yes it's entirely possible.
 

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