White band around acro base?

[BriansBrain]

Does anyone know what these white bands around acro bases are? Is the coralline killing the base? It seems where this is happening is a very dark and thick coralline

 

[thedon986]

Kind of just looks like new growth edge. Many of mine have it too

 

[BriansBrain]

Kind of just looks like new growth edge. Many of mine have it too

Idk. I don’t think it is. In these pictures, left on the arrows in both picture looks like new healthy growth, as compared to the right of the arrows

 

[BriansBrain]

I’ve also been watching this frag whither away and the band moving upwards. I should’ve thrown it away by now, but I seem unrealistically hopeful it’ll stop

 

[DJF]

Have you dipped any of them?

 

[BriansBrain]

Have you dipped any of them?

I’ll try and dip what I can to see. I don’t really see any bite marks and I treated with interceptor about two months ago. Some of the bases have receded maybe 1/2-1” over about 6 months that’s I have noticed

 

[Battlecorals Verified Sponsor]

Looks like they may be competing with coralline for turf?

 

[BriansBrain]

Looks like they may be competing with coralline for turf?

That was my initial thought. Does this sound crazy?

My theory: I did have a period of about a year of very slow growth due to dang white bugs before I figure out that was actually the issue. (after I did the white bug treatment, my alkalinity consumption nearly quadrupled). That let coralline outcompete encrusting bases and some frags.

Maybe scrape the coralline with bone cutters away from the base?

 

[Uncle99]

Looks like it’s overtaking the chyphastrea by sheer grown speed and may inadvertently kill through shading the other.

 

[BriansBrain]

Looks like it’s overtaking the chyphastrea by sheer grown speed and may inadvertently kill through shading the other.

They’re all acros in the tank but I was leaning towards the coralline is aggressively growing over the acro base especially where shaded as you suggested