[Delphinus]

It is calcareous so it has a somewhat leathery texture. As for whether to put in a main display or a refugium ... I think it's six of one, half-dozen of the other. I like the look of it myself, I think it looks fine in my 50's display.

It is a slower grower than say caulerpa, so it's probably not an ideal choice for a primary nutrient exporter. But just pruning it back every so often and you can get some nutrient export, and some is better than none, right?

It seems to work well as a sort of "in-tank" refugium as copepods, amphipods, brittle stars, bristle worms, etc. like to live in it. So it would work well in a refugium as things seem to like living in it.

It can sporalate, just a caution. I've had it happen once in four years. For comparison, I've had caulerpa go several times per year on me.

Supposedly you can dry the stuff and get really nice fine white powdery sand. Although I haven't been able to do that (only tried once though).

So. Email me if you're still interested. I should be around most of the weekend. You have to promise not to laugh at the state of my tanks, though..

And if anyone else wants some ... I have lots. I can probably accomodate everyone if need be :D

Thanks for the interest/replies.. Hope this info helps.