Help sick corals

[SI-Reef]

This tank has been running for the past 14 months. For the past week my corals have been getting sicker each day
I'm not sure what went wrong. My water chemistry looks OK.
what am i missing?

I added photos

Tank Info:
BIO Cube 29 Gal
PH 8.3
Calcium 450
Magnesium 1380
Alkalinity 8.3
Phosphate 0.06 PPM
Nitrate 2PPM
Lighting MH 14K bulb 12" above the tank
Temp 77.2
dosing reef fusion 2 part

I've tried the following
- 15 Gal water change
- Added Chemi Pure Elite
-

 

[Loose tenticle]

What kind of lights are you running?

 

[SI-Reef]

I just replaced the bulb about 2 weeks ago. I went from an XM 20K to a Phoenix 14K

I also was trying the red sea program but switch right back to the seachem reef fusion

 

[Loose tenticle]

Hmm not sure if the change in color spectrum would do that? Have you added anything else, live rock? Maybd you should retest everything, or get it tested at your local fish store for a second opinion.

 

[SI-Reef]

I added the red goniopora

I used two different test kits
Red sea and Salifert the results were almost the same

 

[Loose tenticle]

Adding the goni wouldnt have an effect on your tank rather on the goni, might be a dumb question but did you check your salinity and was the water you changed at the same temperature as the tank.

 

[SI-Reef]

I just checked the salinity its 1.025 and im using a Marine Depot Refractometer

When ever i do a water change the parameter always match the tank water as far as temp and salinity. I'm also using Red Sea salt which i've been using for a while.

 

[wharris]

what were your parameters before the water change? If they change to quick they might have gotten upset.

 

[Loose tenticle]

How long have they been like that

 

[SI-Reef]

Loose
The issue started around the time i changed the bulb
and at the same time i added the Tunze Automatic Top off Nano
I moved the bulb up 12 inches above the tank to reduce the PAR level, but it didnt help

 

[Loose tenticle]

Hmmm did you try putting thenokd bulb back if possible, could be the corals got shocked by the light. When i changed to led from t-5 i had to aclimate them.

 

[LongIslandAndy]

Something to think about, 14k is usually brighter then 20k. Is it possible that the corals are just adjusting to the new light, the pictures don't indicate any disease.

 

[SI-Reef]

I put the old bulb back, lets see if that helps

 

[Loose tenticle]

Lets hope that works keep us informed

 

[evoIX_Reefer]

What else may have changed? Are you sure nothing extra was dosed?

I would keep up with the water changes. Change out your media, if you were running any. I would add carbon just in case.

It'll just take a few water changes (days apart) to stabilize anything that may have gotten in there. Looking at the tissue it couldn't have been that long ago that they went south.

Adjustment of lighting may affect them but your gonipora looks to be at the bottom of your tank and I wouldn't suspect all your corals to act that way due to a bulb change. You swap out corals from another persons tank and it takes maybe an hour or two before they open up. He's not changing Wattage just the wavelength.

 

[sunny]

I am not a LPS person but what about flow? Any changes to that respect?

 

[SI-Reef]

evoIX_Reefer

My dosing is automated using apex controller and the dosing pumps are BRS Doser which puts out 1.1 mL per minute. It added 6ML of 2 part Seachem Fusion with in 24 hours. Its also programed to turn off the dosing pumps if the PH goes above 8.40

I added a bag of Chemi Pure Elite and Seachem SeaGel

 

[CleanYourTank11]

What was the deal when you switched your mh bulbs from the xm20ks to the Phoenix 14ks? I know some people gave you different ideas to acclimate the corals to the new spectrum. Personally I think your corals look fine minus not opening full. I would say if your water quality and parameters are fine, make sure you have some sort of fairly fresh carbon in there, I'd not mess around with the lighting much and get stability there and I would stop dosing any thing other then cal, alk, mag(if you dose those 3) just until you know what's going on with the corals. I think you had too much going on in a short time in a small tank between the lighting and switching off products. Just a thought, good luck!