My Coral(s) Acting Weird

[TheCoralReef731]

I got a long-tentacle plate coral about a month back. Lately it has been retracted into it's skeleton more than it should. My coral book states that this may be because of too much water circulation. However, I don't think that I have too much circulation because my SPS corals aren't doing very well. I have a Mag 7 pumping water up four feet from the sump to the display. I used the head-loss calculator to find that 387 gph are getting to the display. This is only a 25 gallon tank. Is that flow strong or weak?

 

[sherm71tank]

It depends on where the coral is in relation to your return pump output. If all 387 gph are blasting directly onto the coral then that is bad. I bet thats not the case though and would suspect something else. Listing your water parameters, how often you do water changes, what fish you have, where the coral is located, etc.. will help others with your question.

 

[TheCoralReef731]

The pump returns at the top of the tank. The coral is on the sandbed. Water parameters are okay, but nitrate and phosphate aren't at zero. I just did a big water change to reduce them.

 

[menard]

Heliofungia is one of the hardest to keep long in captivity.
usualy from shipping towards the states,( too sensitive ) unless its a healthy colony, might have a chance of living.