PWC and now corals and fish mad/sick...HELP!

[rsigler]

Hey Gang,

I have a 28g reef tank. I have a three yellow-tailed damsels, two clowns, a frog spawn, a hammer coral, a sun coral, and a frag of xenias.

Yesterday I did a 5 gallon water change. Almost instantly the corals closed. The frog and hammer came back out after a few hours, but the xenia has shrunk to very small, but is keeping it's color.

Here is the xenia yesterday before the water change...

and today...

Are they dead? The frog and hammer seem back to normal, BUT...

My damsel fish are hiding. Haven't seen them all day. They aren't even eating.

I did a water test, and everything looks good....

SG 1.023
Ammonia, nitrites, nitrates all 0
PH 8.2
dKh 12
Calcium 404
Phosphates .5

I know the dkh is high.

Suggestions? Help! What is going on? I don't want to loose my system....

Thanks!

Rob

 

[revhtree Verified Admin]

I think with your other corals doing good you don't have to worry about losing your tank. Also I have seen xenia do that and recover so maybe they will recover soon.

 

[rsigler]

Thanks. Any idea why the damsels would be hiding?

 

[Reef Breeders Verified Sponsor]

did you make sure that the temperatures were matched? It sounds like you dumped a bunch of cold water into your tank.

 

[rsigler]

Temp and sg were the same as the tank.

 

[miyags]

The problem might be those crabs in second pic.