Coral Problems

[Nurfed]

I have an odd issue. I’ll start with a stocking list of coral.

1 zoa frag with about 8-10 polyps

1 gsp frag

1 galaxia
1 hammer
1 torch
1 duncan
1 favia

nitrates 12
Phosphates .1
Calcium 490
Magnesium 1500
Dkh 10.4

The Issue:
My Duncan, zoa and gsp don’t like to open. The favia came back from being dead and covered in algae. The hammer/torch/galaxia are all open and loving life.

The zoas will have about 4-5 different polyps half open each day. The GSP will have about 3 polyps out. The Duncan will bounce between half open and closed every few hours.

The Duncan is in the same par range as the hammer. Medium random flow.

The zoas are on the bottom of the tank on an island with direct medium flow.

The GSP is mounted on my back glass about 3/4 of the way up in high random flow.

The hammer is in the only low flow spot of my tank. The torch is in one of the most high random flow spots in my tank.

The galaxia is in the sand with medium flow.

I’m not entirely sure what the issue is for these “easy corals”. I don’t have access to a par meter for exact par measurements. I’m running 3 hydra 32s on a 6ft long by 24in deep tank at 90% blues mounted 14 inches over the water. Tank has glass lids as well. I can attach pictures if anyone thinks it would help.

 

[kingoftheHiLLpeople]

Yea pics may help us out

 

[EeyoreIsMySpiritAnimal]

How long have the problem corals been in your tank, and when was the last time they looked normal?

 

[Nurfed]

How long have the problem corals been in your tank, and when was the last time they looked normal?

The problem corals have been there about a month or more. In place, not moved.

 

[Jekyl]

How old is the tank? What lighting schedule?

 

[EeyoreIsMySpiritAnimal]

The problem corals have been there about a month or more. In place, not moved.

Did they ever look good?

 

[Nurfed]

Did they ever look good?

They did for about two weeks. Lighting schedule is 10 hour photo period with 1 hour ramp up and down

 

[Nurfed]

How old is the tank? What lighting schedule?

It’s been up since May. Rocks have been cured for over a year at this point.

 

[Mr. Mojo Rising]

If everything is fine with the tank, which in this case it sounds like it is, then it usually comes down to light and flow. Maybe post a pic of the tank to help give a visual.

 

[Nurfed]

Pictures as requested

 

[Jekyl]

Pictures as requested

What lighting schedule are you using? You mentioned only intensity.

 

[Nurfed]

What lighting schedule are you using? You mentioned only intensity.

I mentioned it in another reply. 10 hours total with 1 hr ramp up and down

 

[Jekyl]

I mentioned it in another reply. 10 hours total with 1 hr ramp up and down

Are any reaching for the light? Or retracting later on? 8 hours peak is mre than most run. Mine are on for 12 or 13 hours a day with 5 peak.

 

[Nurfed]

Are any reaching for the light? Or retracting later on? 8 hours peak is mre than most run. Mine are on for 12 or 13 hours a day with 5 peak.

The Duncan’s half open for maybe 5 hours at different times of day. The zoas half open all day. The gsp I think might be a flow issue, the few polyps that are open are getting tossed around pretty violently. I may play with the timing of my most intense lighting, although I don’t want to upset the corals that are happy. Quite the conundrum

 

[Jekyl]

I'd check to see what schedule and settings others are using. Then from there it's just stability.