SPS bases bleaching Help!I

chenwon54

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Hello,

I have about 50+ colonies of frag grown and wild colonies. Recently I've been noticing some bleching/tissue recession at he bases of many colonies.

Everything has been dipped and qt'ed before entering the DT. I am fairly positive I do not have any AEFW, RB, or nudis. I have taken the worst affectedd and dipped in TMPCC, revive, betadine, and iodine just to check for any bugs. (not at the same time of course). Nothing out of the ordinary comes off the colonies. A few pods, some microstars, and a bit of detrius. Can't see any evidence of eggs anywhere. There appears to be some very tiny types of algae that colonizes after tissue is dead for a while. I would assume this is normal.

I have hundreds of LPS/zoas in the tank as well. They are all thiving. I know alleopathy could be a factor so I run about a 10 cups of carbon at all times.

The affected areas tend to be on the underside of the branches or at the base in lesser light intensity. Could this be natural recession from lack of light/flow?

My levels are pretty solid. Dkh 9-10 sg 1.025-26 ca at 410-440, ph4 0, nitrate at 5-10. Temp is at 78 degrees mg at 1200-1250 ph at 8.36 and ph at night at lowest i've ever recorded is 8.16.

As far as parameters my only thoughs could be the alk fluctuations one point.. is this enough to impact anything long term?

I add one drop of iodine per day. I was thinking perhaps this isn't enough? I was told that inverts molting regularly is one of the best ways to gauge this..? They molt about once or twice a month in my dt.

Any help would be appreciated. I can post pics if you think it would help.
 

150er

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You should check the ALK, long enough could impact the grow. JMO.
 

cherokee_dude

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Hi Chen!
Is this enough to impact anything long term?
How long ago, how much of a swing and how fast did the swing occur?
I add one drop of iodine per day.
How big is your system? 1 drop probably isn't a blip on the radar at all if you have anything over a pico tank

The affected areas tend to be on the underside of the branches or at the base in lesser light intensity. Could this be natural recession from lack of light/flow
Sounds like normal Branching SPS issues TBH, a Pic would definitely help. Also, if it's a STN issue you might want to start fragging. That is if you see white skeleton that is spreading to areas that are actually getting good light and your parms. are rock solid as you have indicated.

**Placement, and orientation of branching corals is key. I usually wait quite a while before I find a spot that will work based on the structure of others pics of the same coral.**

That being said, I would wait for some hard core SPS guys to chime in with their thoughts.
 

youngtimothy

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I did check my alk for a while, ( I do auto doseing ) and was getting bleaching on underside of my monti cap and base of 1 acro. checked alk and it was around 7. I'm thinking this was the problem.
 

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