--- product_id: 340798529 title: "8oz Concentrated Guillard's F2 Formula" brand: "aqua algae" price: "€ 39.46" currency: EUR in_stock: true reviews_count: 8 category: "Aqua Algae" url: https://www.desertcart.de/products/340798529-8oz-concentrated-guillards-f2-formula store_origin: DE region: Germany --- # Scientifically proven Guillard's F/2 nutrients 8oz ultra-concentrated formula 100% silicate-free & reef safe 8oz Concentrated Guillard's F2 Formula **Brand:** aqua algae **Price:** € 39.46 **Availability:** ✅ In Stock ## Summary > 🌊 Cultivate your reef’s secret superfood—because thriving corals deserve the best! ## Quick Answers - **What is this?** 8oz Concentrated Guillard's F2 Formula by aqua algae - **How much does it cost?** € 39.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/340798529-8oz-concentrated-guillards-f2-formula) ## Best For - aqua algae enthusiasts ## Why This Product - Trusted aqua algae brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Economical & Long-Lasting:** One 8oz bottle supports a thriving reef for months—perfect for savvy marine managers. - • **Reef-Safe & Silicate-Free:** Protect your delicate reef ecosystem—no diatom blooms, 100% safe for all marine life. - • **Scientifically Proven Formula:** Guillard's F/2 delivers essential vitamins and minerals for explosive algae growth. - • **Beginner-Friendly Instructions:** Simple dosing and care guide to get your culture thriving in no time. - • **Grow Your Own Endless 'Pod' Food:** Stop overpaying—produce 230+ liters of nutrient-rich microalgae from one bottle. ## Overview Aqua Algae's 8oz Concentrated Guillard's F/2 Formula is a premium, lab-grade phytoplankton enrichment solution designed for marine aquarists. It enables the economical cultivation of nutrient-dense microalgae, supporting copepods, rotifers, and coral health with a scientifically validated, silicate-free formula that prevents harmful algae blooms while delivering essential vitamins and minerals for robust growth. ## Description This is a commonly used enrichment solution used in the culture of marine phytoplankton.High in essential vitaminsStimulateshigh concentration phytoplankton culturesContains no silicatesDirections:Simply add 1 ml to 1 L (2 ml to a 2 L pop bottle) of fresh saltwater at to 1.019 s.g., add your starter culture and light to 16 hours per day. A 8 oz bottle is enough for approximately 240 liters at f2 concentration!Keep in a cool, dark area and shake prior to use. Review: Good for Pyrocystis - Used this to culture some Pyrocystis/bioluminescent dinoflagellates and its working well, the new cultures I made with the ferts are vigorous and healthy. Not sterile so take some caution but that's easy enough to overcome. Review: The good stuff - This will grow yoir culture correctly. Don't substitute!! ## Features - GROW YOUR OWN "POD" FOOD: Stop overpaying for small, short-lived bottles of phytoplankton. Our concentrated F/2 formula is the secret to easily growing your own endless, nutrient-dense supply of live microalgae to feed your copepods, rotifers, and corals. - ULTRA-CONCENTRATED 8oz BOTTLE: A little goes a long way. This 8oz (236mL) bottle is enough to make over 230 liters (60+ gallons) of full-strength culture medium. It's the most economical way to support a thriving reef ecosystem. - THE PROFESSIONAL STANDARD (GUIL-LARD'S F/2): Don't guess with your fertilizer. Our solution is based on the scientifically proven Guillard's F/2 formula, containing all essential macronutrients, trace minerals, and vitamins (B1, B12, Biotin) for explosive algae growth. - SILICATE-FREE & REEF SAFE: Brewed with pure, lab-grade ingredients. This formula is 100% silicate-free, so it won't trigger a diatom (brown algae) bloom in your display tank. It's completely safe for all reef inhabitants when used as directed. - EASY TO USE FOR BEGINNERS: Includes clear, simple instructions. Just add 1mL per 1 Liter (or 2mL to a standard 2L pop bottle) of new saltwater, add your starter culture, and provide light. Shake well before each use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08ZYGBGPQ | | Best Sellers Rank | #31,232 in Pet Supplies ( See Top 100 in Pet Supplies ) #308 in Aquarium Water Treatments | | Brand | Aqua Algae | | Brand Name | Aqua Algae | | Customer Reviews | 4.8 out of 5 stars 122 Reviews | | Item Form | Liquid | | Liquid Volume | 8 Fluid Ounces | | Manufacturer | Aqua Algae | | Target Species | Fish, Marine Invertebrates | | UPC | 661317842068 | | Unit Count | 8.00 Fluid Ounces | ## Product Details - **Brand:** Aqua Algae - **Item Form:** Liquid - **Liquid Volume:** 8 Fluid Ounces - **Manufacturer:** Aqua Algae - **UPC:** 661317842068 ## Images ![8oz Concentrated Guillard's F2 Formula - Image 1](https://m.media-amazon.com/images/I/51j7a1wKp4L.jpg) ![8oz Concentrated Guillard's F2 Formula - Image 2](https://m.media-amazon.com/images/I/61RZ3rJF-SL.jpg) ![8oz Concentrated Guillard's F2 Formula - Image 3](https://m.media-amazon.com/images/I/71UM-IUEbKL.jpg) ![8oz Concentrated Guillard's F2 Formula - Image 4](https://m.media-amazon.com/images/I/519-3CsH3DL.jpg) ![8oz Concentrated Guillard's F2 Formula - Image 5](https://m.media-amazon.com/images/I/614XkApLWgL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is 1ml for each Liter accurate? Isn’t f/2 generally 1ml per every 2L?** A: I do 1ml per then add an extra ml at the end **Q: What exactly is in this?** A: Hi, The ingredients include water, sodium nitrate, sodium phosphate, iron chloride, sodium EDTA, copper sulfate, zinc sulfate, sodium molybdate, cobalt chloride, manganese chloride, thiamine, biotin, and cyanocobalamin. Thanks! **Q: Store on shelf or in refrigerator?** A: On shelf **Q: When will stock be available ?** A: The 16oz and 32oz are currently in stock and the 8oz should be back in stock in a couple days. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good for Pyrocystis *by P***N on March 16, 2026* Used this to culture some Pyrocystis/bioluminescent dinoflagellates and its working well, the new cultures I made with the ferts are vigorous and healthy. Not sterile so take some caution but that's easy enough to overcome. ### ⭐⭐⭐⭐⭐ The good stuff *by B***D on April 20, 2026* This will grow yoir culture correctly. Don't substitute!! ### ⭐⭐⭐⭐⭐ My chlorella vulgaris is blowing up in density! *by A***S on November 7, 2025* 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! ## Frequently Bought Together - Aqua Algae 8oz Concentrated Guillard's F2 Formula - uxcell 2pcs Clear Rigid Tubing 18mm(11/16'') ID x 20mm(3/4'') OD x 1Ft Length Round Plastic Polycarbonate Tube --- ## 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.de/products/340798529-8oz-concentrated-guillards-f2-formula](https://www.desertcart.de/products/340798529-8oz-concentrated-guillards-f2-formula) --- *Product available on Desertcart Germany* *Store origin: DE* *Last updated: 2026-05-19*