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#1
10-31-2010, 04:15 PM
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they do it for many reasons, mostly i find they do it when its time for a water change....but they do it as defence,if theres too much light ,if algae is growing on the polyps,if they are being picked at or handled,sometimes they dont acclimate well zoas are picky like that
 are these the ones i gave you??its perfectly fine for zoas to stay closed for a few days ive had frags i got off people that didnt open for weeks, i got a little frag of pat last year that i got with just a few heads of yellow and orange and they sat in my tank for months before any sign of life.alot of the smaller frags i get from red coral usually take a few days to open and become comfortable.and i buy 5$ frags from ken and i buy the ones that arent open and see if they open up in my system water changes are a big thing with zoas even if your water tests fine they need regular water changes plus you need to feed them i know alot of people dont but they do a million times better when fed, and mine stay open all night the only reason mine close now is if i need a water change or aiptasia is growing out of them which seems to be my big big big problem lol try to stay clear of deepwater zoos untill you get the hang of taking care of them , they are hit and miss for everyone
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#2
10-31-2010, 05:09 PM
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I was told Alkalinity does this to zoas and palys. You might need to adjust.
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#3
10-31-2010, 05:18 PM
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Could also be lighting.
I purchased a LED setup for my 10 gallon. Had a colony of zoos I got from another reefer. The minute they went in somewhere midway between the top and bottom of the tank they never opened. It was probably 2 or 3 weeks before I clued in. I moved them onto the sandbed in indirect light. Within a few minutes half opened. Within thehour all opened. I kept them there for a good week. Then I moved them up high in the tank again and they have stayed open ever since. They must have been unaccustomed to the high light intensity and when they had a chance to adjust lower in the tank they are fine now. Lately I also had a cyano breakout. Zoos havent opened in days because of it. Looked like things are getting better this morning though and a few were open.
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#4
10-31-2010, 05:56 PM
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Naw Denny these are ones that have been in my tank for a few months now. I will have to check my alk when I get home. As for lighting nothing has really changed for a few months now. I am hoping the water change will work, if not its time for some more
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