problems with zoanthids

creynders · 02/18/2010, 03:51 PM

A lot of my zoanthids are not opening completely. They are open, but are cupped instead of normal. Thease zoas are at verying depths throughout my tank. My tank is aprox 1 year old. All water parameters (ca, dkh, mg, po4, ph, salinity) etc. test OK. Any thoughts?

ritter6788 · 02/18/2010, 03:59 PM

What lighting? What fish do you have?

jb61264 · 02/18/2010, 04:13 PM

how long have you had the zoa's in your tank?...do you have blennies or stars that might be crawling on top of them constantly?

creynders · 02/18/2010, 04:22 PM

I use a 250w hqi 20k for lighting. Only one fish, Fiji Damsel. I do have some small starfish but none seen on the zoas. They are mostly on the bottom of tank and glass sides.

BigRedSpecial · 02/18/2010, 04:36 PM

could be several things. Some crabs will nip at them, toxins in the water will irritate them (from competing corals, dinoflagellates, etc.), causing them to partially close up. There are zoa eating nudibranchs, but I wouldn't think that would cause them all to close up.

02/18/2010, 03:51 PM	#1
creynders Registered Member Join Date: May 2003 Posts: 2	problems with zoanthids A lot of my zoanthids are not opening completely. They are open, but are cupped instead of normal. Thease zoas are at verying depths throughout my tank. My tank is aprox 1 year old. All water parameters (ca, dkh, mg, po4, ph, salinity) etc. test OK. Any thoughts?

02/18/2010, 04:13 PM	#3
jb61264 Registered Member Join Date: Jan 2008 Location: Planet Earth Posts: 1,112	how long have you had the zoa's in your tank?...do you have blennies or stars that might be crawling on top of them constantly? __________________ In the end (and the begining) we're all just stardust anyway... Current Tank Info: 75 gallon SPS reef/55 gallon sump/6x54W TEK T5HO/Reef Octopus 200 Extreme Skimmer/Reef Octopus Single Chamber Calcium Reactor/RKL

02/18/2010, 04:36 PM	#5
BigRedSpecial Registered Member Join Date: Mar 2007 Location: St. John's, Newfoundland Posts: 405	could be several things. Some crabs will nip at them, toxins in the water will irritate them (from competing corals, dinoflagellates, etc.), causing them to partially close up. There are zoa eating nudibranchs, but I wouldn't think that would cause them all to close up. __________________ My progression: 10g/T8 NO to PC; 20h/PC to T5; 45 corner/55 sump/kessil

02/18/2010, 03:59 PM	#2
ritter6788 Say no to clove polyps Join Date: Jun 2009 Location: Marshall, TX Posts: 1,374	What lighting? What fish do you have?

02/18/2010, 04:22 PM	#4
creynders Registered Member Join Date: May 2003 Posts: 2	I use a 250w hqi 20k for lighting. Only one fish, Fiji Damsel. I do have some small starfish but none seen on the zoas. They are mostly on the bottom of tank and glass sides.