Fish are fine Coral is BAD - Emergency!!!

I don't know what is wrong with my tank. Ammonia and nitrate are both 0, my salinitiy is 1.026. My clownfish, damsel and royal gramma are great and swimming happily. The cleaner shrimp is fine. One large snail was curled up on the rocks and all the corals are retracted. I gotta go work nightshift tonight. What can it be?

 

What is your Ca, Mg and ALK reading right now???

 

PH = 8.2
Calcium = 500
Kh = 100

I don't have a magnesium test kit. This all went bad overnight. Went to bed and everything was fine. The next morning, no corals would open up at all. My anemone always shrivels at night and it didn't open again either. Plus the water looked kinda cloudy white. I turned up the skimmer a little and the water is real clear again now.

 

hope that gives some more insight. Gotta leave for work in an hour.

 

Are you missing any fish??? It sounds like a bacterial bloom from maybe ammonia or something spiking.

Plus...how old are your test kits and what kind are they??

 

Presumably typo?!

Ammonia/Nitrate/Nitrite...?!

 

what is your correct dKH?
what type of corals do you have?
do you have a rotten egg smell?
is the bottom layer of the sand black?
what type of lighting do you have?
do you have an oxygen test kit?
do you have a tds meter, if so what is the reading and do you have ro/di?
can you test the Mg?
are you using powerheads?
do you have a refugium?

alot of questions, but needed.

 

yeah dKH is 6 that was a major typo
I have some LPS (hammer, frogspawn) lots of zoa's and mushrooms. Some clove polyps and some leathers.
There is no bad smell. Sand looks white all the way down that I can see.
I have PC lighting there were no changes to lighting or powerhead situation overnight.
No refugium. I have a coralife needlewheel skimmer. A total of 4 powerheads.
I can test TDS at work maybe. I don't have oxygen test kit or magnesium. It's strange to me that all the corals look kinda bleached and staying real small and shriveled. This all happened overnight

 

Have you ever tested for stray voltage ? maybe a bad skimmer pump or power head or even the lights ? Thats where I'd look DKH is low but with LPS corals not to bad.. I'd say voltage leak would be my first guess..

 

with Ca @ 500 the dKH should be around 15 dKH not 6. and you mentioned the water was cloudy, doesnt add up. most cloudy milky looking water means the dKH is to high for the Ca. a Mg test would help. do you dose with any supplements. to much Sr is actually poison. do you feed plankton?