I have some and they grow well. They are often found growing right beside orange bam bam. That's where I got mine, right mixed with my 2 orange bam bam colonies. They seem to need a lot of light as they only took of when I put them near the top of the tank under my metal halide and in good flow. The orange bam bam have also grow well in these conditions and they were having trouble in lesser light.
I always thought they were morph of the orange bam bam somehow because they seamed to grown out of the same matte the bam bam were growing from. Also I had some ever prettier with those ones at the bottom of the pic with the green tentacles but I lost those
