--- product_id: 791136628 title: "Guillard's F/2 Formula Microalgae Fertilizer Concentrate — Phytoplankton Culture Media for Reef Tank, Copepods, Rotifers, Brine Shrimp Food | Made in USA | 16.9 fl oz (500ml)" brand: "the coral ranch" price: "¥11136" currency: JPY in_stock: true category: "The Coral Ranch" url: https://www.desertcart.jp/products/791136628-guillards-f-2-formula-microalgae-fertilizer-concentrate-phytoplankton-culture-media store_origin: JP region: Japan --- # High-density phytoplankton boost Concentrated 500ml formula Proudly USA-made quality Guillard's F/2 Formula Microalgae Fertilizer Concentrate — Phytoplankton Culture Media for Reef Tank, Copepods, Rotifers, Brine Shrimp Food | Made in USA | 16.9 fl oz (500ml) **Brand:** the coral ranch **Price:** ¥11136 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your microalgae game with the pro’s choice fertilizer! ## Quick Answers - **What is this?** Guillard's F/2 Formula Microalgae Fertilizer Concentrate — Phytoplankton Culture Media for Reef Tank, Copepods, Rotifers, Brine Shrimp Food | Made in USA | 16.9 fl oz (500ml) by the coral ranch - **How much does it cost?** ¥11136 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/791136628-guillards-f-2-formula-microalgae-fertilizer-concentrate-phytoplankton-culture-media) ## Best For - the coral ranch enthusiasts ## Why This Product - Trusted the coral ranch brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Made in the USA:** Crafted domestically to ensure premium quality and consistency. - • **Precision Formula:** Guillard's F/2, the gold standard for microalgae nutrition, trusted by pros. - • **Concentrated Efficiency:** 500ml of potent fertilizer concentrate for long-lasting, effective use. - • **Phytoplankton Powerhouse:** Supercharge your aquatic cultures with high-density microalgae growth. - • **Unlock Aquatic Potential:** Ideal for researchers and aquaculture managers aiming for peak productivity. ## Overview Guillard's F/2 Formula Microalgae Fertilizer Concentrate is a 500ml USA-made solution designed to deliver high-density phytoplankton cultures. Trusted by professionals, this concentrated formula optimizes microalgae growth for research and aquaculture applications. ## Description Buy The Coral Ranch Guillard's F/2 Formula Microalgae Fertilizer Concentrate — Phytoplankton Culture Media for Reef Tank, Copepods, Rotifers, Brine Shrimp Food | Made in USA | 16.9 fl oz (500ml): Aquarium Water Treatments - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - PROVEN GUILLARD'S F/2 RECIPE — The academic standard for marine microalgae culture since 1962, supplied as a single ready-to-use concentrate. - BULK SIZE FOR HEAVY CULTURE WORK — Cultures Nannochloropsis, Tetraselmis, Isochrysis and other marine microalgae used to feed copepods, rotifers, brine shrimp, SPS corals, clams, and larval marine fish; sized for breeders, hatcheries, and serious reef hobbyists. - EASY DOSING, LOWEST COST PER LITER — Add 1 ml per liter (≈ 4 ml per gallon) of freshly mixed seawater. One 16.9 fl oz (500 ml) bottle fertilizes about 500 liters / 125 gallons of culture media. - MIXED, MEASURED, READY TO USE — Complete F/2 formulation with macro and trace nutrients combined in a single bottle; just dilute with seawater. - MANUFACTURED IN-HOUSE BY THE CORAL RANCH — Made in the USA at our own facility; sealed dropper-friendly bottle for clean, repeatable dosing. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CKM628G2 | | ASIN | B0CKM628G2 | | Best Sellers Rank | #131,543 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,018 in Aquarium Water Treatments | | Brand Name | The Coral Ranch | | Customer Reviews | 4.0 4.0 out of 5 stars (51) | | Date First Available | August 13, 2023 | | Included Components | Microalgae Fertilizer | | Item Form | Liquid | | Item Weight | 236 g | | Item model number | f/2 10 fl oz | | Liquid Volume | 10 fluid ounces | | Manufacturer | The Coral Ranch | | Manufacturer | The Coral Ranch | | Manufacturer Part Number | 1 | | Model Number | f/2 10 fl oz | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Product Dimensions | 2.2 x 2.2 x 9.5 inches; 8.32 ounces | | Target Species | Aquatic Plants, Invertebrates | | UPC | 197644137695 | | Unit Count | 16.9 Fluid Ounces | | Warranty Description | 30 days | ## Product Details - **Brand:** The Coral Ranch - **Item Form:** Liquid - **Item Weight:** 236 g - **Liquid Volume:** 10 fluid ounces - **Number of Packs:** 1 ## Images ![Guillard's F/2 Formula Microalgae Fertilizer Concentrate — Phytoplankton Culture Media for Reef Tank, Copepods, Rotifers, Brine Shrimp Food | Made in USA | 16.9 fl oz (500ml) - Image 1](https://m.media-amazon.com/images/I/518agEUXGPL.jpg) ## Available Options This product comes in different **Size** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/791136628-guillards-f-2-formula-microalgae-fertilizer-concentrate-phytoplankton-culture-media](https://www.desertcart.jp/products/791136628-guillards-f-2-formula-microalgae-fertilizer-concentrate-phytoplankton-culture-media) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-14*