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snigema
07/20/2008, 12:06 PM
I've got a 550g Reef Tank. The candy cane corals are having the flesh fall off their heads. The flesh does not die for 1-2 weeks. The other problem is montipora corals don't live more than a week. Calcium is 430ppm, Alkalinity is 8.9 dKh, Magnessium is good. Tank is skimmed with a Deltec Skimmer and Maintains a temp of 80 with a chiller. The lighting is 3- 400 Watt Mogul Metal Halides 14000K and 4-250 Watt HQI 20000K. Any ideas on what could be causing this. Thanks.
Underwaterparadise
07/20/2008, 02:00 PM
When you say MG is good what is it ? 1200,1300,1400??? How old are your test kits? What is the Nitrates, ammonia and,Salt level etc.?

How close to all that light are the effected corals?
snigema
07/20/2008, 07:26 PM
Magnessium is 1390, salinty is 1.025, No Ammonia, Less than 5 ppm Nitrate. Phosphates less than .003. I'm thinking it is some sort of predation but I can't see anything on the corals. The candy canes loose their flesh from the base and then they float around.
Underwaterparadise
07/20/2008, 07:55 PM
Have you tried dipping them with a Coral dip and/or Interceptor? What's the PH any swings in PH?
johnanddawn
07/21/2008, 04:15 AM
check the flow on the candy - i have found they will start to do the polyp bailout thing if they are getting to much flow
but then again that doesn't explain the monti problem so....
snigema
07/21/2008, 08:14 AM
I've tried a iodine coral dip, but it doesn't seem to have an impact. The pH fluctuates from about 8.2 during the day down to 8.0-8.1 at night. The tank does have about 8000 gph water flow, but the candy canes are in all different locations, some with very little flow. Everything was fine for the first 6-7 months, then the montipora started dying, after they were all gone it seemed the candy canes were next on the menu. I have not tried Interceptor yet, but it will probably be next on my list.
MCsaxmaster
07/22/2008, 01:29 AM
How long has the tank been set up?
All Delight
07/22/2008, 01:20 PM
Have you read that thread which something like this is discussed?
All Delight
07/22/2008, 01:51 PM
This might be helpful for you

http://reefcentral.com/forums/showthread.php?s=&postid=12944427#post12944427