--- product_id: 665084835 title: "16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces" brand: "aqua algae" price: "€ 112.73" currency: EUR in_stock: true category: "Aqua Algae" url: https://www.desertcart.hr/products/665084835-16oz-concentrated-guillards-f-2-formula-for-marine-phytoplankton-cultivation store_origin: HR region: Croatia --- # Scientifically proven F/2 formula Silicate-free reef safe 470+ L culture volume 16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces **Brand:** aqua algae **Price:** € 112.73 **Availability:** ✅ In Stock ## Summary > 🌊 Cultivate the future of your reef—grow smarter, feed richer! ## Quick Answers - **What is this?** 16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces by aqua algae - **How much does it cost?** € 112.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/665084835-16oz-concentrated-guillards-f-2-formula-for-marine-phytoplankton-cultivation) ## 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 - • **Beginner-Friendly Usage:** Simple dosing instructions make cultivating marine phytoplankton effortless—even if you’re new to reef keeping. - • **Grow Your Own 'Pod' Food:** Double your value with endless live microalgae cultures to feed copepods, rotifers, and corals. - • **Reef-Safe & Silicate-Free:** Lab-grade purity ensures no brown algae blooms, keeping your reef inhabitants safe and thriving. - • **Professional Standard Formula:** Based on Guillard's F/2, packed with essential macronutrients, trace minerals, and vitamins for explosive algae growth. - • **Super-Concentrated 16oz Bottle:** One bottle makes over 470 liters (124+ gallons) of nutrient-rich culture medium—economy meets efficiency. ## Overview This 16oz concentrated Guillard's F/2 formula is a professional-grade, silicate-free nutrient solution designed for marine phytoplankton cultivation. It enables hobbyists and aquaculture pros to produce over 470 liters of live microalgae culture, essential for feeding copepods, rotifers, and corals, while ensuring reef safety and optimal growth with scientifically validated ingredients. ## Description This is a commonly used enrichment solution used in the culture of marine phytoplankton.High in essential vitaminsStimulates high concentration phytoplankton culturesContains no silicatesDirections: 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. A 16 oz bottle is enough for approximately 480 liters at f/2 concentration! Keep in a cool, dark area and shake prior to use. ## Features - GROW YOUR OWN "POD" FOOD (DOUBLE THE VALUE): Stop overpaying for small, short-lived phytoplankton bottles. 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. This 16oz size offers even greater savings per liter! - SUPER-CONCENTRATED 16oz BOTTLE: A little goes a very long way. This generous 16oz (473mL) bottle is enough to make over 470 liters (124+ gallons) of full-strength culture medium. It's the most economical way to support a thriving reef ecosystem and keep your cultures booming! - 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 | B08ZYMLQ8G | | Best Sellers Rank | #43,617 in Pet Supplies ( See Top 100 in Pet Supplies ) #965 in Water Treatments | | Brand | Aqua Algae | | Brand Name | Aqua Algae | | Item Form | Liquid | | Item Weight | 16 Ounces | | Manufacturer | Aqua Algae | | Net Quantity | 16.0 Milliliters | | Number of Packs | 1 | | Target Species | Shrimp | | UPC | 661317842075 | | Unit Count | 16.0 Milliliters | ## Product Details - **Brand:** Aqua Algae - **Item Form:** Liquid - **Item Weight:** 16 Ounces - **Manufacturer:** Aqua Algae - **UPC:** 661317842075 ## Images ![16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - Image 1](https://m.media-amazon.com/images/I/51T-gQ0o8UL.jpg) ![16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - Image 2](https://m.media-amazon.com/images/I/61RZ3rJF-SL.jpg) ![16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - Image 3](https://m.media-amazon.com/images/I/71UM-IUEbKL.jpg) ![16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - Image 4](https://m.media-amazon.com/images/I/519-3CsH3DL.jpg) ![16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - Image 5](https://m.media-amazon.com/images/I/614XkApLWgL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is it safe for reef aquariums?** A: Yes, when used as directed for phytoplankton culture. Not intended for direct addition to aquariums. **Q: Does this product contain live phytoplankton?** A: No. This product is a concentrated formula for culturing phytoplankton. It does not contain live phytoplankton. **Q: What type of lighting is recommended?** A: Provide bright illumination for 16-24 hours per day. LED or grow lights work well. **Q: How should I store it?** A: Store in a cool, dark location. Keep tightly closed. ## Frequently Bought Together - Aqua Algae 16oz Concentrated Guillard's F/2 Formula for Marine Phytoplankton Cultivation, Aquaculture, Reef Tanks, 16 ounces - North Mountain Supply 1 Gallon Glass Jar Wide Mouth with Black Plastic Lid - USDA, BPA-Free, Made in the USA - for Fermenting, Storing, Canning, and Much More! - The Coral Ranch - Guillard's F/2 Formula Microalgae Fertilizer Concentrate 12 fl oz (350ml) --- ## 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.hr/products/665084835-16oz-concentrated-guillards-f-2-formula-for-marine-phytoplankton-cultivation](https://www.desertcart.hr/products/665084835-16oz-concentrated-guillards-f-2-formula-for-marine-phytoplankton-cultivation) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-17*