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jason edward

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Okay, this is absolutely not the right place to post this, but I respect those of you here more than anywhere else, and would appreciate any help or input.
2 separate tanks, two different people. Same problem!
All acros and montis, start dying from the growth tips down. It is slow, and will take a newly introduced colony about six week to show symptoms.
Polyps remain extended below the dying tips.
Here's some info:
No red bugs.
Both systems were heavily skimmed (750 gallon with 2 twin becket bullet XL 3s, and a 300 g with 2 single becket bullet XL 3s). This was reduced.
All parameters are spot on and consistent.
Both systems have large euphyllias. Both have abundant zoos.
Both had a weird tough red turf algae growing on the rocks, that only emerald crabs would eat.
Lighting was different for both systems, though symptoms are the same.
We started to use plenty of carbon, water changes, you name it.

Initially I thought the zoos were throwing something out (those pink bubblegum ones). Then the algae seemed the culprit, as I've only ever seen it in these two tanks, and nowhere else.

I've never seen anything like this before, can't think of any supplement that may be lacking, can't find any parasite. These sytems are top of the line when in come to setup and equipment, and the owners are exceptionally knowledgeble. But we're stumped.

Any ideas?
 

bookfish

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Location
Norcal
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Perhaps the systems are stratified in terms of water flow. I have seen the effects you describe in systems where all water flow was horizontal. If so, there might also be a temp gradient from top to bottom of tank which would show clearly on an IR therm.-J
 

Len

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Does the entire colony eventually die from the top all the way down to the base, or just the tips are affected?
 

jason edward

Experienced Reefer
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Bookfish, that';s intersting, I'll check it out!

Len, the tips die completely (the first 1/2 - 3/4 inch), leaving the base still alive. This hold on for several weeks, and then sometimes dies, or it is pulled out.
 

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