Can something like this Color up?

IME, yes. I've bought a few like that and the color lightened up nicely. It's a gamble, but one coral in my tank is the most wanted frag when other reefers come to visit and it looked worse than the one you just posted when I bought it from DiversDen. I think the one you're looking at could end up being an awesome coral.
 
You can see the hints of what looks to be a nice flouro green pigment on the bottom right branches, it is just stressed. It will color up nicely but it can take a few months with wild colonies - in know because that's all i can buy in Aus.
 
It is a gamble. That is the main issue with these maricultured or wild pieces. I used to buy such pieces; some turn out to be gems; whilst most others simply stayed browned out. If I buy wild or mari pieces, they are always now small frags. Means I dont spend too much and if after many months, it doesnt colour up, I can keep it somewhere in the tank, without it taking up valuable space. Or I can sell/give away.I now try and buy aquacultured pieces; these are highly likely to be hardy and will colour up easily given the right water conditions.With mari/wild pieces, generally, but now always; even given the right captive conditions; they are still brown outs or even RTN/STN even in the best of SPS systems. Perhaps it is the high level of flow, light or availability of food in the ocean that we cannot just provide; which is missing in our tanks which such corals are accustomed to...who knows...but for the most part I avoid wild and mari pieces. Good luck. :)
 
They require tons of flow and light I bought a brown a hyacinth that I put 6 inches directly in front of a 6055 at 100%. It has colored up nicely (red) and it is growing fast.
 
It is a gamble. That is the main issue with these maricultured or wild pieces. I used to buy such pieces; some turn out to be gems; whilst most others simply stayed browned out. If I buy wild or mari pieces, they are always now small frags. Means I dont spend too much and if after many months, it doesnt colour up, I can keep it somewhere in the tank, without it taking up valuable space. Or I can sell/give away.I now try and buy aquacultured pieces; these are highly likely to be hardy and will colour up easily given the right water conditions.With mari/wild pieces, generally, but now always; even given the right captive conditions; they are still brown outs or even RTN/STN even in the best of SPS systems. Perhaps it is the high level of flow, light or availability of food in the ocean that we cannot just provide; which is missing in our tanks which such corals are accustomed to...who knows...but for the most part I avoid wild and mari pieces. Good luck. :)

They require tons of flow and light I bought a brown a hyacinth that I put 6 inches directly in front of a 6055 at 100%. It has colored up nicely (red) and it is growing fast.

Well I feel like I can possibly provide that...

I currently am running a 20 long with a 20 sump...

SWC 160 skimmer(major over skimming :P)

150 watt 10k halide, 2x t5s, and I plan on adding some LED strips.
 
i just got one as brown and yes it will color up. mine is fluorescent green right now under moderate lighting
 
Mine was that cream grey color when I got it. Directly under MH 14k it colored up to a nice green.

I agree it likes a ton of flow and very intense lighting.

One of my favorite tabling acropora.
 
i just got one as brown and yes it will color up. mine is fluorescent green right now under moderate lighting

How long did it take? I've purchased a Bali Acro Millie and because of stress (low temp) it lost most of the colors. It was maricultured.
 
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