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Old 06-15-2005, 07:44 PM   #1
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Coral not open

I have a 175 gal reef tank and about 3 days ago the corals closed up and have not opened since. the pH is 8.2, ammonia is 0, nitrite is 0, nitrate are 0, SPG 1.022, calcium is 450/ppm. what else to check?
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Old 06-15-2005, 09:26 PM   #2
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Welcome to AquariumAdvice.com

What type of coral?

Also need to know the alk, how long you've had the coral, what's near it, what type of light you have, age of set up, fish and inverts, any recent addition or changes...

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Old 06-15-2005, 09:32 PM   #3
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Including changes to rock placement or water flow. I know my star polyps close up for a couple of days every time I change the flow around them.
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Old 06-15-2005, 09:54 PM   #4
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4 frogspawn, galaxia, 2 hammer, torch. meat leather coral

about 3 month

alk I don't have a test kit but will tomorrow

840 watt pl ho

no fish

4 cleaner shrimp

1 coral banded

3 sally lightfoot crabs

tank set up for about 5 month

nothing changed that I know of

did a 15% water change yesterday hoping it would help
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Old 06-16-2005, 10:37 AM   #5
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Still need to know what actual coral we're dealing with here

It will also help to know what's the next closest coral. Once you have your alk reading please post that as well.

A pic of the coral and the immediate area around it would help if you can post one.

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Old 06-16-2005, 08:53 PM   #6
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ok alk is 9.8 dhk
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Old 06-16-2005, 08:55 PM   #7
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more pic
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Old 06-16-2005, 08:57 PM   #8
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final 2 hope this helps
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Old 06-16-2005, 09:29 PM   #9
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Nothing is standing out as a specific problem but there are a few "general" correction you should try.

Most of your issue seems to be with the LPS corals. They do not need highly intense light and with your amount, they are too highly elevated. All can be moved midway or preferabley lower. Except for the branching species, all of the other should be moved to the sandbed directly, including the goni. None of the non branching species will appreciate being placed within the rock work. It can cause irritation and possible necrosis. The branching one must be carefully placed so as no crown if too close to or touching rock.

The proximity of each isn't that bad but be sure to keep a good 4-5" space between them. More for the frog and anchora. Be sure to run your tank with carbon as often as possible and ensure the skimmer is running efficiently. All of these coral species have pretty good nematocysts and cause severe distress if allowed to build up.

Also be wary of excessive or directed water flow. These kinds of corals appreciate gentle flow and will recede or worse if there's too much.

The chemistry is not bad (although the salinity could go up a point or two) but I would allow the alk to fall a bit closer to 3 mEq/l and the Ca down to 425 ppm. You don't appear to have a low Mg problem so do not dose anything for that. On the subject of dosing, what have you been using to get the levels that high and how often?

One last thought, what salt have you been using and is it always the same salt each time?

Cheers
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Old 06-16-2005, 10:09 PM   #10
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I have been using Kent for salt and all my additives. I use Essential elements and coral accel weekly, liquid calcium to maintain 450 ppm, I just got today strontium & molybdenum, pro buffer and tech-m. I try to be consistent about adding chemical and weekly water changes. The leather coral has a white all most powerly look to it. should this be a concern? I pick up kent reef carbon today and running it now. Why would the corals look good then close up in 1 day after being in the same spot for a peorid of time? I would agree with you about moving then if this occurance happened over time.
Thanks Skoogie
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