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
Fish Food
Premium Nori Seaweed for Marine Fish
Thick, 100% pure aquarium-grade nori for tangs, angelfish, rabbitfish and blennies.
Choose your size
50 sheets75 g / 2.64 oz
50 large sheets8″×8″ · 150 g / 5.29 oz
100 sheets4″×8″ · 150 g / 5.29 oz
Prices as listed on Amazon on October 3, 2026. The current price on Amazon may vary.
- 100% pure seaweed. No salt, oil, preservatives or flavorings. Safe for reef tanks, corals and invertebrates.
- Thick sheets. Holds its shape under water, so fish graze naturally instead of it crumbling into your tank.
- Resealable pack. A zipper seal keeps moisture out, so the last sheet is as fresh as the first.
About this product
Our premium nori gives herbivorous and omnivorous marine fish the natural, grazing diet they look for on the reef. It is rich in protein, vitamins and minerals, supports digestion, brings out color and keeps fish active.
It is a favorite for tangs and surgeonfish, angelfish, rabbitfish, foxface and lawnmower blennies, and for sea urchins such as tuxedo, pincushion and long-spine urchins.
We are reef keepers ourselves, and we choose our nori specifically for marine fish.
Guaranteed analysis
- Crude protein (min)
- 40.2%
- Crude fat (min)
- 2.8%
- Crude fiber (max)
- 4.2%
- Moisture (max)
- 4.6%
Directions & care
- Feeding
- Cut a strip about 2 inches wide. If you use a veggie clip, fold one sheet into a small square and attach it.
- Storage
- Store in a cool, dry place. Reseal the zip top after opening.
- Warning
- Not for human consumption. Keep out of reach of children.
You might also need
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.