Leopard Wrasse causing RTN?

[GardenVariety]

My tank is going on 2 years old. I started adding SPS about 8 months ago and everything has been growing well. All my parameters are stable. I dose ALK/CA 12 times a day for stability. I've had no temperature fluctuations. Nothing has changed other than adding a large Leopard Wrasse two weeks ago who immediately taught my other wrasses to dig in the sandbed and create sandstorms 4-8 times a day. I came into my office today and noticed a well established Acro colony had started to RTN and was about half way gone. I immediately removed the colony. Could my wrasses be causing the RTN?

 

[mrg02d]

Might be stirring up sandbed and releasing toxic gas/compounds. I’d run some activated carbon.

 

[outssider]

I have noticed when I stir up the sand during a water change my staghorns don't like it! they get snotty treads coming off them, especially on the tips. I think they are irritated by the fine grains of sand in the water column …..but they get over it within a few hours.....

 

[reefmutt]

I guess the stirring up of the sand may be releasing microbes or bacteria or gas but it would be way down the list of possible causes for me..
I have a orange spot goby who makes sandstorms regularly and I’ve never had an issue...
I kind of suspect it’s a coincidence..
What parameters do you test for regularly? And what are the results?
How deep is the sand bed?
How’s your flow? After 8 months, if the corals have grown well, they may not be getting the flow or light they used to get..
Not ruling out your theory but I’ve never really seen a correlation between sand stirring fish and rtn- in a perfectly healthy reef..

 

[Reefer40b]

I guess the stirring up of the sand may be releasing microbes or bacteria or gas but it would be way down the list of possible causes for me..
I have a orange spot goby who makes sandstorms regularly and I've never had an issue...
I kind of suspect it's a coincidence..
What parameters do you test for regularly? And what are the results?
How deep is the sand bed?
How's your flow? After 8 months, if the corals have grown well, they may not be getting the flow or light they used to get..
Not ruling out your theory but I've never really seen a correlation between sand stirring fish and rtn- in a perfectly healthy reef..

I also doubt the wrasse has anything to do with it, I have a couple leopards and a very large christmas wrasse that make sand storms all the time never had any issues with rtn from them. I would look else where for the cause if possible.... you may not find one...