Sponges

[Europhyllia]

I have had great luck with our orange sponge. It has gotten even more vibrant than it was when I bought it. I love them and want to get more.

Same here. It arrived kind of splotchy but colored up quickly. I am an orange sponge fan because of how well that one did but I am excited about my photosynthetic blue sponge.

No idea about the rotifers. Since they are so tiny I don't rinse them like I do the other frozen foods so if the rots themselves are too big the liquid stuff should be small enough.
Here's info: http://www.dtplankton.com/oystereggs.html