The Three Core Biological Pillars
Choose from a variety of high density, axenic phytoplankton cultures with zero contamination, harvested fresh. Starter cultures can be used for feeding aquariums. Our cultures are highly concentrated at around 40 million living algal cells per ml.
Sterile Live Cultures
Tailored Strains
Encounter a variety of phytoplankton strains ranging from the red algae Rhodomonas to the green Tetraselmis so your filter feeders can proliferate and grow. We provide rare compounds like the rare ARA lipid and 22-dehydrocholesterols for nutrition beyond plain monocultures.
Phytoplankton blends are shipped separately in order to prevent interspecies competition, and organized into ratios to ensure complete lipid profiles. Utilize microalgae blends and monocultures to cover the full nutritional profile of your organisms. Digestible microalgae ranging from 1-100 microns. Backed by biology articles and experiments, we strive to improve our algae everyday with applied phycology.
Optimized Ratios
Whether you are a Hobbyist or Hatchery manager, we have something for you
PhytoCore™
Our flagship 5-Species Phytoplankton blend-whether for hatcheries or a home aquarium, everyone returns to the basics.
Starter Cultures
Browse axenic phytoplankton species to manage in-house operations.
Want to Learn More?
Take a look at our articles to learn more about our products or general advice for your aquarium. You also have full access to our research articles and experiments.
Grow Kits
Access materials in order to grow your own phytoplankton.
The Flowchart
© 2026 Orr Biologicals. All rights reserved.