Acan is sunken in

[abecker]

For the past week my acan has seemed to be sunken in. The only think I have changed was increasing the blues in my leds and decreasing the white and red, but the overall intensity has stayed the same. Is this normal for them or is there something that can be causing this?

 

[reefhobby]

Where is it at in your tank?

 

[abecker]

It's on the sandbed. It is a standard 125 gallon so it is 22" deep.

 

[reefhobby]

What light?

 

[abecker]

Radion xr30. It's on the rms mount so it's about 8" above the water. Max intensity is 52%.

 

[abecker]

The light has the wide angle lens installed also.

 

[abecker]

Ammonia/Nitrite - 0
Phosphate/Nitrate - Reading 0 but algae is growing in the tank so there should be a small amount

Fish: Yellow tang, blue hippo tang, 2 clownfish, royal gramma, lawnmower blenny

 

[TheEngineer]

I'd try process of elimination first. Put your light back where it was and see if there is a difference.

The intensity setting doesn't refer to the actual light intensity the way you might think. Certain colors put off more "light intensity" at varying "electrical intensities" which is what you are controlling.

 

[DeniseAndy]

What flow is around the acan? How long have you had it? Was it ever opening? Did it go in after the fish? Did it stop opening when you changed the lights?

 

[khuran]

What is that brownish thing on the sand on top of your acan?

 

[abecker]

Brown diatoms

 

[BigJohnny]

How long have you had it in your tank? It's likely getting too much flow or still acclimating if it's new. I have tons of acans and have seen them do just about everything. IME they usually do that due to too much flow, retreating from irritation by livestock (usually more temporary), or if they are new to the tank and hiding/stressed.

 

[abecker]

It has been in the tank for about 4 months. I'm going to try putting the lights back to how I had them and see what happens. It may be that it just didn't like the change.

 

[Shep]

So I doubt the light change had much to do with it, what inverts do you have? They can mess with corals pretty easily. Besides the light change, has anything else in the tank changed?

 

[abecker]

That has been the only change. As far as inverts just a cleaner shrimp, some snails, and 3 very small blue legged hermits.

 

[Shep]

Do you ever notice the hermits on or near the acan? Typically light would make an acan close up if you had increased or decreased the intensity but color changes don't usually do much to corals (unless they are major changes)

 

[abecker]

It was a fairly big color change, went from a default apex programming of around 14k color, to a custom program that is around 18-20k. I don't see the hermits around the acan.

 

[BigJohnny]

I also doubt it was the lights but who knows. They usually are not that sensitive to light changes like that. I'd bet it's not, if it's only been that way for a day or so just leave it and see if it comes around. If you change the lights it could improve and youll think it was the lights when it might not have been, and I'm assuming you changed your lights originally for a reason and would like to keep them the new way.

If it doesn't improve in a few days, then change the lights

 

[Shep]

So I would try moving the acan around to different spots to see if it opens back up and if that does not work then I would go ahead and change the lights back.

 

[BigJohnny]

It was a fairly big color change, went from a default apex programming of around 14k color, to a custom program that is around 18-20k. I don't see the hermits around the acan.

That would not stress the coral.