Once called Spirulina Pacifica, now called Athrospira Platensis.
Sprinkle a small amount directly into your tank to feed brine shrimp or invertebrates.
Make a slurry with water and then add to your tank.
Add to your favorite personal “gut packing” recipe to add minerals and betacarotenes to your fish and inverts.
Buy Spirulina On-Line at Seahorse.com