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Old 08-30-2010, 09:41 AM   #1
lv2jumpaints
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Zoas not opening


i have a colony of green/yellow zoas that did really good up until a week ago and then they stopped opening. i have also notice that the number of the polyps seem to be dropping. I looked it over and did not see anything on it. What could be causing this?

the lighting has not changed and checked the water levels, everything checks out.

Should i do a dip just to be safe?
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Old 08-30-2010, 09:57 AM   #2
DeepBlue15
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how old are the lights? what kind too? also what kind of light cycle are you running. and last but not least parameters of your water?
sorry if i'm grilling you a bit. Zoa's are mostly photosynthetic and create their own food from light. they aren't very light demanding though. but the info might help figure it out a bit better.
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Old 08-30-2010, 10:08 AM   #3
lv2jumpaints
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the lights are less then 6mo old, T5. day bulbs on for 10 hours and actinics for 12....the zoas are at the bottom of the tank.
amonia 0.00
nitrite 0.00
nitrate 10ppm
ph 8.2
i have another colony and they are doing ok.
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Old 08-30-2010, 10:37 AM   #4
DeepBlue15
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ok could be just that colony. some times they wont open at all for a while. i had a green/orange colony that would shut up for a day or two then open. some times i found the cause was a hermit would walk over the colony or a fish swim too close. but a lot of times its just the attitude of the colony. they don't look like they are "melting" at all? if that happens then your losing the colony. might be for many reasons. other then that, do you see any brown or white spots of any kind?
one more thing i can think of and i lost a group of xenia due to a slight brain fart. i let the salinity get way to low. 1.021. corals do best with salinity 1.203 to 1.025. but i've seen a lot of other ranges. that one is the most consistent answer though. check salinity too
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Old 08-30-2010, 10:51 AM   #5
touzi
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do a ro freshwater dip my dragon eye zoas wouldnt open up all the way so i asked someone and they said to do a freshwater dip just put them in fresh ro water splash them around for five mins and they had all kinds of stuff falling off of them put them back in stayed closed for a day and then now there all open
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Old 08-30-2010, 11:10 AM   #6
mitchmac
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they could be shocked from changing systems / water params / lighting/ malnutrition there all kinds of reasons on why this could happen. I dont really dip anything. except fish's
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Old 08-30-2010, 11:29 AM   #7
jenglish
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I would probably try a FW dip. Zoas are intertidal and get exposed to both air and rain, so they are pretty tolerant. Watch for spots of infection and see if anything comes off of them in the dip like worms or spiders.
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Old 08-30-2010, 06:20 PM   #8
lv2jumpaints
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well gave it a FW dip and a fuzzy worm thing fell off of it, so perhaps that was the culprit.
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Old 08-31-2010, 07:09 AM   #9
Sohal Tang
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finicky


I find zoos overall are a darn finicky item...
I have had them thrive incredibly and then all of a sudden take a turn
and die off within a week for no apparent reason...

Sometimes they go into a closed dormant stage for a week or so or even weeks and then wammmmmmmm they open up as if nothing was wrong....

very weird...

I don t know the answer and if anyone figures that out please let me know hahahaha

The dip sounds like it worked.

Good luck

Tim
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Old 08-31-2010, 09:13 AM   #10
jenglish
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Quote:
Originally Posted by lv2jumpaints View Post
well gave it a FW dip and a fuzzy worm thing fell off of it, so perhaps that was the culprit.
probably a bristle worm. That can be looked at a couple of ways. BW are detritivores... the 6 dollar word for eater of poop and dead stuff. So a BW may have been eating, which wold be a bad sign. On the other hand... they are called bristle worms for a reason. They are covered with bristles and if he had decided to take up residence there it would certainly be irritating the zoas. zoas that never get to open up don't get to fulfill their energy needs.
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