need help!

[makana]

I have a 29g cube. My bubble coral has been looking sick the last couple of days. One side doesn't inflate at all and the other is half inflated. I added an open brain coral a week ago. I've been looking for pests on the bubble coral but there is nothing I can see. Amonia 0, nitrite 0, nitrate 0, phosphate 0, ph 8.1, alk 1.8 meq/l or 5.04 dkh, calcium 380.

I've never had calcium and alk go low like that before so I'm not really sure what I should be doing to raise them back up.

All I have is the bubble, brain, and a sun coral so I don't know why I have this dip. I'm going to do a water change tonight to see if that helps.

Any suggestions?

[Flash]

can you get us a pic? do you have any fish or inverts that might be attacking it?

[makana]

I'll try and get a pic tomorrow. I just finished the water change and the coral is all closed up. The tissue on the bad side appears to be receding and the skeleton is exposed. I checked the new water and calcium was only 400 and alk was 8.96dkh.

There is a hermit crab, cleaner shrimp, clown fish, and chromie. I havn't seen any of them bother it and none of them are new, but I guess it could happen.

[Flash]

is there any other corals touching it?

could it have gotten stung?

[makana]

I wondered the same thing but from what I read the open brain doesn't have long enough tentacles to reach.

[Flash]

brains have a sweeper tenticle that can sting. If the side that is damaged is closest to the brain, I would try moving them atleast 4-6" apart for a while and see if it can bounce back.

I had a ric sting a head of candycane and it went right down the the skeleton and to me was completly gone... then 4 days later i noticed it bouncing back SLOWLY... but it has now come back!