I haven't tried spirulina, but I have tried 50 micron golden pearls, which is also basically dust and very buoyant. As long as the mixing pump is positioned correctly to create a gentle vortex, it should mix in nicely. I'll put spirulina powder on the testing to-do list though.Has anyone tried feeding dried spirulina with the Plank? The algae is difficult to get fully suspended in a water solution because it seems to want to float on the surface. I'd only be adding this algae to the pellet concoction in my Plank. I'm currently using my Plank for the hourly daytime feeding of my Anthias. I'd be mixing in the spirulina for my filter feeders.
TIA...