Acro on toxic frag plug?

[Robswdiver]

Got an Acro the other day mounted on a plug that is the same color as a....clay pot?
Noticed that the frag has grown up and out and never laid a base. It got me thinking, could the plug be made of a material that was toxic to the coral? I have never seen this type of plug before and was wondering what everyone's take was on it.
As soon as the coral acclimates to my tank I think I'm going to take it and clip it away from this base and maybe mount it on a smaller plug?
What are everyone's thoughts?

 

[SoloGarth]

I think if it was really bothering the coral it would be experiencing tissue necrosis from the bottom up. Lack of growing a base could be due to shading? Just a guess though.

 

[biggles]

That looks like it's mounted in a depression in the middle of the plug. I would use a nice new white flat topped plug to mount it on which will bounce some more PUR down low for a month or two until it encrusts or is covered with coralline algae.
It looks like it's growing in dark hole............:blown:

 

[Robswdiver]

It is mounted in a depression style plug. My thoughts were to put it on a flat base plug, but just curious why it never laid a base.

I just introduced it to the tank so I placed it very low and in a somewhat shaded spot. As time progresses I will slowly move it to its slated spot higher in the tank.

So....has anyone seen this type of plug? Any idea what it could be made out of?

 

[macdaddynick1]

Not all acro frags lay base, especially if the frag is already big and can sustain itself without having to encrust, IMO small frags encrust better than the bigger frags . I've fragged big and small pieces from the same colony , bigger pieces usually just start growing upwards and smaller ones encrust first and then start growing .