Bubble coral not too happy

[plunderisley]

Had this bubble coral for a few weeks. Was doing excellent but the past few days he is not inflating all the way. I don't know if it's just something that happens or something to worry about. The flow hasn't changed - he is on the other side of the tank where my mp40 is so I would say low-low/med flow. I videotaped it over 24hrs and skipped thru it to see if something was bothering it and nothing. I don't have any crabs in the tank. Water parameters are good (7.4kH, 1210Mg, 420Ca, 79F, no PO4 or NO3...etc) and it's stable given all the monitoring I do. Am I just paranoid?





Here are some daytime shots:

and a nighttime shot:

And I turned off the pumps at night (as I was fixing something with the wiring) and noticed this while they were off:

 

[lgull1]

There is nothing wrong with this Bubble coral. I have had one for 12+ years. They change shape all the time especially at night. They deflate and inflate sometimes during the day as well. They need to be target fed though. Put some meaty pieces of food inside there when they extend there tentacles. Enjoy

 

[plunderisley]

There is nothing wrong with this Bubble coral. I have had one for 12+ years. They change shape all the time especially at night. They deflate and inflate sometimes during the day as well. They need to be target fed though. Put some meaty pieces of food inside there when they extend there tentacles. Enjoy

Yeah I did that and he ate it all up. I'll keep a eye on it and post back.