duncans won't open

nazzman · Sep 16, 2013

I have a duncan coral with 20+ heads it hasnt opened up fully in over a month now no clue why everything else in tank seems to be growing just fine qny ideas on why this would happen would be great

Alesolra · Sep 16, 2013

How much you have KH?

Coraloliseffect · Sep 16, 2013

Have you moved them or a pump or return? Too much flow can tick them off too

joeogio · Sep 16, 2013

Look at it real close I had a tiny shell from a snail get stuck in between the branches on mine and I guess the duncan felt it was there and wouldn't open up it stayed that way till I removed the shell. Other than that try and move it somewhere else if, my Duncans are tanks not much seems to bother them

Alesolra · Sep 16, 2013

If the alkalinity is too low they dont open

nazzman · Sep 16, 2013

I keep alk between 9n10

nazzman · Sep 16, 2013

They have been in same spot almost 3years

Trickdout69 · Sep 18, 2013

I'm having the same exact problem. Mine has closed up and won't open. Nothing has changed in my tank.

miyags · Sep 18, 2013

I hate when nothing changes in the tank and problems pop up. Bad batch of new salt mix? Toxic warfare between corals? maybe try some activated charcoal? any change in flow? New fish nipping?

Trickdout69 · Sep 24, 2013

Anyone on this?

eliramos · Sep 24, 2013

bump!

Tahoe61 · Sep 24, 2013

Mine will not tolerating any near by corals touch it what so ever. Are there any near by LPS that may be stinging it at night with sweeper tentacles? The Ducan is the carnary in my tank, if it's closed I know there is an issue.

Trickdout69 · Sep 24, 2013

No mine is so far away from everything.

NanaReefer · Sep 25, 2013

Best advice from personal experience is....do several large water changes. It has always worked for me when my Duncan & Candy Canes wouldn't open. Even though my parameters were all within limits and stable. Oh and both corals have been in my tank for 4yrs.