Fish Food
Premium Nori Seaweed
Thick, 100% pure aquarium-grade nori for tangs, angelfish, rabbitfish and blennies.
3 sizes from$14.99View sizes
Made by reef keepers · Florida, U.S.A.
Better food and cultures for a thriving reef
Thick, pure nori seaweed for your tangs and grazers, and Guillard’s F/2 fertilizer to grow your own live phytoplankton. Simple products we use in our own tanks.
- 100% pure seaweed, nothing added
- Since 1962 the standard F/2 recipe
- Made in USA in our own facility
Our products
Everything we make, in every size
Each product comes in several sizes, all available on Amazon.
Phytoplankton Culture
Guillard's F/2 Fertilizer
The academic-standard recipe for growing your own phytoplankton, mixed and ready to use.
3 sizes from$14.99View sizes
Why The Coral Ranch
Small company, reef-tank tested
Chosen for marine fish
Our nori is aquarium-grade and selected for tangs, angelfish, rabbitfish and blennies. No salt, oil or flavorings.
Mixed in-house
We manufacture our F/2 concentrate ourselves in the USA, as one complete, ready-to-use bottle.
Reef keepers ourselves
We only sell what we rely on in our own systems, and we are happy to answer your questions.
Reef care
Learn what feeds a healthy reef
Guide
Marine phytoplankton: tiny organisms, massive impact
How phytoplankton powers the marine food web, and what live phyto does for corals, clams and water quality in a reef tank.
Read the guide →GuideThe vital role of copepods in reef tanks
Why these small crustaceans are the “heartbeat” of the food web, and how they bring balance and biodiversity to your tank.
Read the guide →Order with confidence on Amazon
All of our products are sold through our Amazon store, so you get Amazon’s secure checkout, shipping and returns.