Help on SPS growing without polys

[Montrosereef]

I got some SPS fargs and all were doing great in the first week. All of a sudden, two of them stop opening polys but seem to be growing without polys. I wonder what caused them to stop opening up. All my water parameters are fine and stable. I changed carbon, GFO, and dose Prodibio reef booster in between. I wonder if GFO may have something to do with it. or too much light?

 

[J-Dog]

I had the same issue and thought one of my fish were nipping at them. Then I came to realize that I had redbugs! I would check your coral for them and AEFW......just my opinion

 

[ritter6788]

What fish are in the tank?

 

[Montrosereef]

no fish or red bugs in the tank. I suspect it is GFO or prodibio treatments. They were fine before I change/do the treatment.

 

[mainereefer]

I have a deepwater that I have never seen an open polyp on but it has grown about 3/4"-1" in 2-3 months

frag started off around 1/2" now its around 2" with multiple branches starting

 

[Montrosereef]

Mine are millepora. they should open polys. or maybe it is normal for SPS to not show polys while in huge grow