Suddenly Left Side Corals Aren't Doing Well...

KenCaro305

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As of yesterday our left side of my tanks corals haven't been doing too well. Our Torches, Hammers, Frogspawns and Duncans below are all struggling, I had to remove one Torch this morning because one of the heads started to show the white as the head looked like it was dying. All of these corals have been in the tank for a month or 2 now. Meanwhile everything else in the tank, including my Cynarina which is on the left middle and the Wellso which is dead center of the tank are doing fine. We check our parameters daily and there hasn't been any change in Nitrates, Phosphates, Calcium, Magnesium or Alkalinity. Salinity has maintained between 1.024 and 1.025.

Anyone have any ideas on what could be causing this or recommendations to check?

Recent Events for background:
- On 6/7 we did a 10 gallon water change on the 62 gallon tank and siphoned the sand
- On 6/8 we added a Spotted Mandarin to the tank
- Evening of 6/8 to 6/9 forgot to turn the return pump back on the left side but there was still continuous flow from the Reefwave and other side pump. This return pump had been off for roughly 8 hours. (this is what I currently suspect to be the cause).
- On 6/9 we took the Dragon Soul out to clean bubble algae off it quickly
- On 6/9 we added more Copepods and fed the corals with Oysterfeast

Fish1.jpg Fish2.jpg Fish3.jpg
 

Gumbies R Us

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Parameters?
Flow they are getting?
Lighting?
 
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KenCaro305

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Parameters?
Flow they are getting?
Lighting?
ALK 8.8 dKH
pH 7.9
Ca 411
Mg 1468
Ammo 0
Nitrite .1
Nitrate 15
PHOS .2 (been this way for 2 weeks, we added PhosFiltrum 2 weeks ago to help)

Flow has been the same outside the 8 hour window where their side return pump had been off which was 2 days ago.

Lighting hasn't changed, we use an AI Blade and it ramps up from 11am to 1230pm stays that way until 7pm then ramps down to 830pm.
 

BryanM

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I've left my return pump off over night with no ill effects... I doubt this was it.

Are they looking better today? I would expect them to bounce back. If not, I would start to wonder about any coral warfare going on over there.... But the most likely culprit I see in the tank is the bubble coral, and it looks to be far far aware from the left side of the tank.
 
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KenCaro305

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Not too much better, but maybe ever so slightly for some of them. They aren't fully closed.
 
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KenCaro305

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Tested the water again yesterday evening to see if anything had changed that may show what was going on

ALK 8.96 dKH
pH 7.9
Ca 407
Mg 1485
Ammonia 0
Nitrite .1
Nitrate 14
PHOS .19

Left side of the tank still looks like its struggling while the rest of the tank looks like it is thriving (before lights come on). Torches on the right side of the tank are fine. Bubble coral on the right side of the tank is perfectly inflated. Wellso in the middle of the tank looks like its on steroids. Cynarina in the left middle of the tank is fully open and extended.

Would a water change make sense to try? Or does anyone else have any ideas?
 

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