Sps disease, pest or fish?

[oldpaddy]

Every few weeks to a month I start dealing with tissue loss on mainly my acroporas, but also my birdsnest. I checked my notes and this dates back to an order of acros I received about a year ago. Before this order I had some huge colonies and hadn't had this issue before. My corals suffer tissue loss in various areas. Sometimes a good chunk will die and other times it's just a small area. Most of my acros are still alive and continue to grow. Just not nearly as well.
I'm guessing it's a pest, but I can't find anything with my naked eye. Could be a fish, but I haven't seen any chomping going on.

220 mixed reef, 55 gal sump. Been up for years.
79f
0-5ppm no3
1.026
Kessler led

Thanks for any help.

 

[oldpaddy]

Shoot. I meant to put this in a different section.

 

[sfin52]

It could be a pest check at night with red light. What's you fish list.

 

[oldpaddy]

It could be a pest check at night with red light. What's you fish list.

Let's see...
I'm sure I'll forget some.
Various damsels, Sargentmajors, clowns and a few other that I can't remember.
Hippo tang, tomini, and another one that I can't remember.
Green chromis
Banggia cardinalfish
Green mandarin
Hoevens wrasse
Coral beauty
And a spotted hawkfish

 

[rkpetersen]

You might consider sending a water test to ATI and/or Triton for analysis.

Also have you had Kessils the whole time? I know people who swear they can't get acros to grow well with Kessils although that's purely anecdotal.

 

[oldpaddy]

You might consider sending a water test to ATI and/or Triton for analysis.

Also have you had Kessils the whole time? I know people who swear they can't get acros to grow well with Kessils although that's purely anecdotal.

No, I switched to kessils a couple of months ago. I was using 300w Chinese blackboxs for 2 or 3 previous years. They worked good except they were loud and I didn't care for the coloring. I'm still getting growth since I switched to kessils.

 

[oldpaddy]

Here's some pictures

 

[RichtheReefer21]

Did u acclimate the light slowly when u changed over?

 

[oldpaddy]

Did u acclimate the light slowly when u changed over?

Yup.
This has been a continuing problem for a year now. Every few weeks to a month and the dying starts again. Some acro and birdsnest corals get hit one month and then some don't. It's only affected my acros and birdsnest.

 

[sfin52]

When was the coral baeuty added. They may become a coral muncher.

 

[oldpaddy]

When was the coral baeuty added. They may become a coral muncher.

At least 3 years ago. I cant find him in my notes and my notes go back 3 years. I very rarely see him. He's a hider.

 

[sfin52]

Well that's not the problem.