

🌊 Fuel Your Reef’s Future with Every Drop!
F2 Ferts (16oz) is a professional-grade, concentrated Guillard's F/2 formula designed for cultivating high-density phytoplankton cultures. Ideal for feeding copepods, rotifers, and corals, this silicate-free, reef-safe fertilizer enables users to produce over 470 liters of nutrient-rich algae culture from a single bottle. Backed by science and easy to use, it supports sustainable reef tank health and vibrant aquatic ecosystems.
| ASIN | B08ZYMLQ8G |
| ASIN | B08ZYMLQ8G |
| Best Sellers Rank | #27,983 in Pet Supplies ( See Top 100 in Pet Supplies ) #256 in Aquarium Water Treatments |
| Brand Name | Aqua Algae |
| Customer Reviews | 4.7 4.7 out of 5 stars (108) |
| Date First Available | March 24, 2021 |
| Date First Available | March 24, 2021 |
| Directions | Simply add 1 ml to 1 L (2 ml to a 2 L pop bottle) of fresh saltwater at ~1.019 s.g., add your starter culture and light ~16 hours per day. |
| Item Package Dimensions L x W x H | 8.03 x 2.48 x 2.32 inches |
| Item Weight | 16 Ounces |
| Manufacturer | Aqua Algae |
| Manufacturer | Aqua Algae |
| Number of Items | 1 |
| Package Dimensions | 8.03 x 2.48 x 2.32 inches; 1 Pounds |
| Size | 16 |
| Target Audience Keyword | fish |
A**.
Good Product
Works like a charm
A**S
My chlorella vulgaris is blowing up in density!
This stuff has helpled my chlorella vulgaris culture grow wonderfully! And its sheer size could last me multiple decades based on my math (which hopefully isn’t flawed)! Overall, wonderful product! Would recommend for any phytoplankton or algae culture!
J**O
Good food for phytoplankton.
This helps amazingly with my Phytoplankton culture. Thanks for this product.
M**A
Stands up to thousands of reviews as best microalgae fertilizer
Great value! Only need 1 ml per liter! Can make 1000 liters of growth solution per bottle when mixed with filtered water. Odorless. High quality/easy to use. It is used to grow quality, healthy, vibrant strains of almost any type of algae or phytoplankton for science projects or climate research. Very useful! Personally, I am usually a critic before a proponent of the products I buy. But this fertilizer lived up to the claims. I use it to grow a few different species of algae, which I then use to add nitrogen to my compost bin. I also have a reef tank with wild grown live rock (which has to my knowledge, hundreds of different organisms that live attached or inside the rock). To keep them healthy, they need a steady supply of phytoplankton and certain algae. The live rock is over 2 years old and all the filter feeders, fans, and barnacles are still going strong!
A**E
Phytoplankton fertilizer
Awesome product
S**R
Only phytoplankton fertilizer
Have been using this for months now and I have had a steady supply of phytoplankton. Just need a live culture of phytoplankton. With using this and fresh saltwater you'll never run out of phytoplankton
J**W
Guillard's F/2 Soution
I've been using Guillard's F/2 fertilizer for a few years growing phytoplankton. A very good product. I appreciate it being available now in 16 oz bottles.
T**N
Works wonders would 100% buy again
Perfect quality and the functionality of how to use it and how it works is very simple and ease of use for anyone
Trustpilot
1 week ago
2 days ago