RTN

[Matthias7]

i have a few random corals that are rtn'ing. I have been dealing with issues for some time now. In the past few months I moved my equipment to my fish room and connected to a new sump and a few frag tanks. When I connected the tanks I realized that the salinity in my sump was higher then my dt. I lost a few colonies during this and now I random sps that will rtn. Tissue loss only takes place at night. All lps corals are fat and healthy. I monitor Alk and ph daily and it always stays within range. I do daily automated water changes and have 0 nitrates and phosphates (not ideal). I am about 2 months into running an aquaforest system.
I have a list of suspects but non are ironclad. I have noticed since I connected the two systems a white wispy filament on areas of rock that do not receive direct light which I believe is bacterial. My first inclination was Alk swings or something of nature but the parameters have been good. This morning when my lights came on the white filaments seem to have devoured most of a large montipora. So this is now my #1 suspect. Does anyone have any ideas/suggestions on how to elimate this from my tank? I will stop the carbon dosing for now (aquaforest) but the issue was there prior so it will not eliminate the issue.

 

[Matthias7]

You can see the white wispy filaments at the edge of the healthy tissue. This montipora looked perfect 2 days ago

 

[cginter]

From past personal experience... leds tend to do that to my montis when the coral isn't healthy and any shaded area turns white. And Mg was low. Temp swings also

But like u said u had an alk spike that will also cause it.

As far as the white film on the rocks I have no idea as I've never experienced it.

 

[mhaun]

I found monti nudis in my system. Same results. Added several wrasse and manual removal. Pita! Still working at it.

 

[Matthias7]

This is the only affected monti and the Alk swing was 4-5 months ago. I have 2-3 acros currently afflicted as well. Can I outcompete the bacteri with a product like special blend?

 

[mhaun]

"A few months ago" seems like you should have been out of the woods. When I alk drop or raise I can almost count the days to some rtn at two weeks later if it was severe enough.