Well actually I was going to mix it with Marine Snow for more suspended particles for my inverts and corals. I bought some of the rotifer 100-200 micron and they sent me a small tube (1oz) of the cluster 60-100 micron. i used 1/8 tsp for my 50 gal tonight and my mushrooms opened wide in just a few minutes. Also thought it would be good to sustain my remaining barnacles.
...rick