Why aren't frag disks purple?

[Hemlawk]

Am I right?

 

[MaiReef]

I get it, but once you find a good spot, remove the coral from the disk and glue it to the LR. Eventually they turn the color of LR, but I do get it.

 

[d2mini]

I've had purple ones before.
I think they were from The Alternative Reef.

 

[wkscott]

Just ask and you will receive.
Most dealers don't use them as they are a tad more expensive.

http://www.bulkreefsupply.com/ecotech-marine-coral-frag-plugs.html