Tube Corals

[sage_commander]

I have a bunch of these red/brown corals in my tank. The rock has been in for a week as of today. At first they were all healthy-looking, by which I mean their tentacles were all extended. Really cool looking. But starting yesterday there are some that have retracted and stay that way. I noticed the temperature was rather high (about 82.5), which I am trying to correct. Is there anything else I should be doing? These guys need to eat sometime right? Thanks.

 

[Eldouble]

Check your phosphate level. Once I got mine down, the tubes opened back up. I also pour in some Kents Micro-vert food I bought at PetCo. Most fish stores will cary something like it.