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Old 11-19-2013, 01:09 PM   #11
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I can't imagine it is the lighting. We are talking 1 watt LEDs and the zoas (3 colonies) are all at the bottom 1/3 of the tank. Plus I have had this setup for close to 4 months with no issues like this at all.

I see why it would appear to be light but my marineland reef capable led is not going to be too bright for zoas. Even with the Skkye fixture I can't imagine it is just too bright.
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Old 11-19-2013, 01:41 PM   #12
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How long have the zoas been in the tank? How long have you had your current light setup? Are you dosing anything?
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Old 11-19-2013, 07:55 PM   #13
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The zoas have been in the tank since June and the lights have been running as they are since late July. I just started dosing with C balance to get my alkalinity up since it is always low. The issues with the zoas an other corals have been going on since before I started the c balance.
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Old 11-19-2013, 08:02 PM   #14
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The crazy thing is that none of the sps corals are affected whatsoever. I also have a frogspawn and hammer and chalice that aren't phased. Te kenya tree, mushrooms, and zoanthids (all apparently beginner corals) are affected. Also, I have had some very healthy xenia that have been partially melting in spots at times. After being closed for about 2-3 hours the zoas open up again.
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Old 11-19-2013, 08:21 PM   #15
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Softies tend to tell you something is wrong with water parameters long before stony corals. If salinity or alk are off your softies will tell you.

Find it odd that they shrivel up after lights come on but resume their normal routine later in the day.
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Old 11-21-2013, 01:56 AM   #16
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Any other thoughts from anyone? It happened again today. For about 2 hours the corals closed up. Even the anemone. Then after about 2 hours or so it is back to normal.
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Old 11-26-2013, 05:11 PM   #17
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It has been a few days and no responses about this so I thought I'd resurrect this thread. The cycle continues every day. My anemone is also closing up when my zoanthids are as well. No apparent ph or temp swing.

I am going to try shortening the lighting. I have the actinics on for 12 hours and the marineland reef capable on for 9 of those 12. Maybe I'll go to 10 actinic 8 white. Or 9 and 7 even.

Any other ideas?

The crazy thing is that my sps are growing. Not just surviving but actually growing.
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Old 11-26-2013, 05:23 PM   #18
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I am leaning towards ph !
I was reading and ph does swing from day to night .
Phos can sometimes be high and not detected
I was advised awhile to test mag , alk and cal .
Mag alk and cal all help stabilize ph ?
That's what I understood anyways
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