Ducan not opening

[Danny_B]

Hi
I bought ducan (9 heads) last week. its been in my tank for 8 days now and hasnt opened. The branches look healthy, ive tried to spot feed 4-5 times. one time i got a tentacle or 2 out but thats it. Its in a 29g with 10g sump.

alage scrubber.
40llbs live rock
12cw/12rb rapidled 60degree optics 18" from water surface
birdnest

stylo
monti
hammer
frogspawn
welso
zoas
gsp
maxima clam
maxi mini carpet nem
starry blenny
2 mocha clowns
6 line wrasse
pistol/goby pair
peppermint shrimp
cleaner shrimp
sexy shrimp
sally lightfoot crab
hectors goby
hermits
snails
lettuce nudibranch


ph 7.8
nitrate 0-5
sg 1.026
temp 79


rio 10hf at 4ft head
240 gph of actual flow measured by me
2 koralia 2's
i run spectrapure ro/di. 0 tds

everything else is doing well.

i unplugged both koralia, to see if it helps.


should i be worried ?
thanks for your help
DAnny

 

[y0ung0ne]

Mine likes a low flow on it. It could also just be getting used to the new enviroment as well this is JMO so not to sure what else it might be is lighting as well what type of light do you have and what were they under when you bought them.

 

[DarthSimon]

What's your NO4?

 

[jamesbaur13]

does food make him more willing to open up?

If so you might want to throw him in a bowl of tank water... add some food to the water and try to keep it suspended without spooking him.

If it seems like it's working then add more food, let him feast, then put him back in. If need be, repeat again.

Luckily, my duncans opened up right away, but I have heard this trick being used to help get sun corals to feed... might be worth a shot.

 

[kingfisher62]

Yeah, 8 days is a long time to be closed. Something must be ****ing it off.
Your pH is a little low and I am guessing your alk may be off. I would say low to moderate placement on both light and flow.
I would not try to feed it until it has full polyp extention.
First thing I would do is try a 5g water change and see if that helps.

 

[aperry2728]

I am having the same problem with my dendro. I bought it a few days ago and it is really closed. The only thing I can think of that's wrong maybe that a little hermit crab likes to crawl on it once in a while and I need a powerhead. Any suggestions? It was an expensive coral and I need all the help I can get.

I have a strong light ati sun power 6x24 2 clowns and an anemone and fire fish. I have been keeping up on my water exchanges.

 

[dpeoples]

Really odd. I posted a thread last week as well on this. Had it since August its grown from 15 heads to almost 40. Fed it last Sunday afternoon as of today has not opened since. All parameters ok no other corals out of wack including a large elegance. Maybe its that time of the year. Still hoping mine comes back.

 

[coralobsessions]

I have similar problems with duncans.. Just don't like my tank.

 

[Mr_N1ce]

did you check if its opening during the night? My Duncan was barely opening when I put him on my sandbed but was open during the night. Just after I moved it into the shadow (still on sandbed) it would open during the day as well.