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Old 07-23-2013, 11:54 AM   #1
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My SPS Corals are Bleaching

This is a weird one for me. I have a 72g bowfront with many corals- 2 montis, a birdsnest, a few softies, and several LPS. I have all of these under T5's. Everything has been great and thriving for many many months. All of a sudden, my SPS started turning white, quickly. My birdsnest turned in a day. The others are starting to turn to. Before you say you can't grow SPS under T5's, my ATI bulbs were working and everything was growing like crazy. I think this happened because my giant mushroom coral closed for a period and secreted a slime/new top. Could this be the cause, and if yes, can this be reversed. My water quality is good: other than alk, which I am trying to raise. The tank has been up for 2 years. What do you think?
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Old 07-23-2013, 12:32 PM   #2
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Whoever says you can't grow sps under t5 is clearly misinformed. I think it's your alk. Meanwhile, you can run some carbon to remove the leather's effects.
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Old 07-23-2013, 12:44 PM   #3
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Alk too low? To high? I still don't get what makes sps bleach....
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Old 07-23-2013, 12:50 PM   #4
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Unless the leather is close to the birds nest I wouldn't see it as the reason for such a quick decline. Sps and softies aren't always friends, but I can't see this as being the reason.

Every time I hear of a quick sps downfall, after much hunting, research, and discussion we have landed in alk. Too high and too low can cause fast death. Do you normally dose anything that would cause a fluctuation in alk? Couple weeks between water changes? What are you using to test your alk and what are current levels?
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Old 07-23-2013, 12:56 PM   #5
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Alk fluctuations can cause RTN. This is what you are experiencing, correct? Rapid tissue necrosis. Usually from the bottom up.
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Old 07-23-2013, 01:25 PM   #6
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It is deteriorating from the bottom/base up. And it's happening fast.
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Old 07-23-2013, 01:50 PM   #7
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If you stablize the alk will the coral come back from RTN?
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Old 07-23-2013, 01:52 PM   #8
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Is the Alk issue also true for LPS?
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Old 07-23-2013, 02:55 PM   #9
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Thanks X. I think I caused this by overdosing. I check my parameters and then have the local LFS double check. Everything was perfect but my ALK was down a lot. I dosed more than usual one day, and that threw off my toadstool. It shriveled up for days and then start secreting its top layer or mucus. Then my SPS started receding rapidly.
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Old 07-23-2013, 02:55 PM   #10
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Yes, the coral can come back, however, you might need to frag off the dead part. Make sure you take care to cut off some of the good flesh along with the bad so to not leave any on the living parts.
I haven't seen a lot of problems with LPS and Alk. SPS seems more sensitive to it. That's not to say that they (lps) aren't effected by it. They probably are. I've just never seen one decline so quickly as SPS does.
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