--- product_id: 5505821 title: "PhosGuard, 100 mL bagged - 67101850" brand: "seachem" price: "84 kr" currency: DKK in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.dk/products/5505821-phosguard-100-ml-bagged-67101850 store_origin: DK region: Denmark --- # Rapid phosphate & silicate removal Bead-shaped for optimal water flow High capacity porous beads PhosGuard, 100 mL bagged - 67101850 **Brand:** seachem **Price:** 84 kr **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquarium game with crystal-clear water—don’t let algae win! ## Quick Answers - **What is this?** PhosGuard, 100 mL bagged - 67101850 by seachem - **How much does it cost?** 84 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/5505821-phosguard-100-ml-bagged-67101850) ## Best For - seachem enthusiasts ## Why This Product - Trusted seachem brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safe & Gentle:** Protects fish and plants while eliminating harmful nutrients. - • **Clear Water, Fast:** Slash phosphate & silicate levels in days for pristine aquarium clarity. - • **Long-Lasting Power:** 100 mL treats up to 60 gallons, delivering extended performance. - • **Engineered for Flow:** Bead-shaped media ensures maximum water contact and efficiency. - • **Trusted Aquarium Essential:** Seachem’s proven formula outperforms competitors every time. ## Overview Seachem PhosGuard is a high-capacity, bead-shaped filtration media designed to rapidly remove phosphate and silicate from both marine and freshwater aquariums. Its porous structure optimizes water flow and treatment efficiency, treating up to 60 gallons per 100 mL bag. Safe for aquatic life and easy to use, PhosGuard outperforms competing products to maintain crystal-clear water and healthy tanks. ## Description Phosguard rapidly removes phosphate and silicate from marine and freshwater aquaria. It is not recommended for phosphate buffered freshwater. Phosguard is highly porous for high capacity and bead-shaped for optimum water flow. It outperforms all competing products. Review: Effective and Reliable Phosphate Remover for Aquariums - I’m absolutely thrilled with Seachem PhosGuard and here’s why I’m giving it a 5-star review: 1. Excellent at Removing Phosphates: I’ve been dealing with high phosphate levels in my aquarium for a while, and Seachem PhosGuard has been a game-changer. After using it for just a few days, I noticed a significant reduction in algae growth, which was one of my main concerns. The product works efficiently at removing phosphates, improving water clarity, and maintaining the overall health of my tank. 2. Easy to Use: The 100 mL bag is convenient and easy to place in the filter. It’s designed to be used in a filter bag, which makes it super simple to add to your system. I also appreciate that it’s not messy and doesn’t leave any residue in the tank once it’s in place. 3. Safe for Aquatic Life: I love that Seachem PhosGuard is safe for my fish and plants. I’ve had no negative effects on the aquatic life in my tank after using it, which is a huge relief. It’s one of the reasons I trust Seachem products—they’ve always proven to be gentle on sensitive ecosystems. 4. Fast-Acting Results: The results were quick! My water cleared up in just a few days after starting to use it. You can see the improvement in the clarity of the water and a reduction in algae build-up. If you have any phosphate-related issues in your tank, this product will definitely help. 5. Long-Lasting: While the bag is small, it goes a long way! The 100 mL lasts quite a while, and you can reuse it for multiple cycles. This makes it a cost-effective solution for keeping phosphate levels in check. 6. Great for Freshwater and Saltwater Tanks: I’ve used this in both my freshwater and saltwater aquariums with great success. Whether you’re managing a fish-only tank or a reef tank, this product works across the board. 7. Reliable Brand: Seachem is a brand I’ve trusted for years, and this product lived up to the high standards I’ve come to expect from them. Their products are always effective and reliable, and PhosGuard is no exception. Final Thoughts: If you’re battling high phosphate levels in your aquarium, Seachem PhosGuard is a must-have. It’s effective, easy to use, and safe for both fish and plants. The results are noticeable quickly, and I’ll definitely be keeping this product stocked in my aquarium maintenance supplies! 🌟 Highly recommend for anyone needing to reduce phosphates and improve water quality in their tank! Review: Helped reduce algae in my tank - Been using this for a while and it has helped with the algae in my tank. While it comes already bagged for use in larger aquariums, I have a 20 gal and use it in smaller mesh bags in my HOB filter. I can't say enough how much the SeaChem products have improved my tank quality! Love my healthy tank and fish! ## Features - Rapidly Removes Phosphate And Silicate From Marine And Freshwater Aquaria - Highly Porous For High Capacity And Bead Shaped For Optimum Water Flow - Outperforms all competing products - Not Recommended For Phosphate Based Buffers In Freshwater Aquaria - 100 milliliters treats 60 US gallons ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00029PO6O | | ASIN | B00029PO6O | | Allergen Information | Yam Free | | Best Sellers Rank | #7,501 in Pet Supplies ( See Top 100 in Pet Supplies ) #52 in Aquarium Water Treatments | | Brand Name | Seachem | | Customer Reviews | 4.6 4.6 out of 5 stars (1,967) | | Date First Available | October 30, 2005 | | Department | Unisex-Adult | | Global Trade Identification Number | 00000116018500 | | Included Components | Seachem PhosGuard, 100 mL bagged - 67101850 | | Is Discontinued By Manufacturer | No | | Item Form | Liquid | | Item Type Name | Seachem PhosGuard, 100 mL bagged - 67101850 | | Item Weight | 2.4 Ounces | | Item model number | 185 | | Liquid Volume | 100 Milliliters | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer Part Number | 185 | | Manufacturer recommended age | 1 month and up | | Model Number | 185 | | Product Dimensions | 1.25 x 4.69 x 5 inches; 2.4 ounces | | Target Species | Fish | | UPC | 000116018500 | | Unit Count | 1 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** Seachem - **Item Form:** Liquid - **Item Weight:** 2.4 Ounces - **Liquid Volume:** 100 Milliliters - **Manufacturer:** Seachem Laboratories, Inc. ## Images ![PhosGuard, 100 mL bagged - 67101850 - Image 1](https://m.media-amazon.com/images/I/91rfIZYcbGL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: I was using Phosguard in a Freshwater tank that has a problem with Diatoms. Now my Java fern is turning yellow and leaves are dieing.** A: Java ferns are leaf feeders. They love phosphates. **Q: can it be use on hang on back filter? with high flow rate?** A: I don't see why not, it may reduce the flow some, but if you are having a problem it truly helps. We do a water change once a month and change it every other month. Our tank looks better and the fish have been healthier. Good Lock ! **Q: I have some brown algae on my sand bed and green algae on my glass in my 20 gallon lps reef tank. will this help? can it hurt my tank in any way?** A: Brown algae (diatoms) & green algae can definitely be affected by phosphates & silicas. It won't hurt your tank at all. **Q: is this more or less the same as using chem-blue?** A: No. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Effective and Reliable Phosphate Remover for Aquariums *by T***O on February 17, 2025* I’m absolutely thrilled with Seachem PhosGuard and here’s why I’m giving it a 5-star review: 1. Excellent at Removing Phosphates: I’ve been dealing with high phosphate levels in my aquarium for a while, and Seachem PhosGuard has been a game-changer. After using it for just a few days, I noticed a significant reduction in algae growth, which was one of my main concerns. The product works efficiently at removing phosphates, improving water clarity, and maintaining the overall health of my tank. 2. Easy to Use: The 100 mL bag is convenient and easy to place in the filter. It’s designed to be used in a filter bag, which makes it super simple to add to your system. I also appreciate that it’s not messy and doesn’t leave any residue in the tank once it’s in place. 3. Safe for Aquatic Life: I love that Seachem PhosGuard is safe for my fish and plants. I’ve had no negative effects on the aquatic life in my tank after using it, which is a huge relief. It’s one of the reasons I trust Seachem products—they’ve always proven to be gentle on sensitive ecosystems. 4. Fast-Acting Results: The results were quick! My water cleared up in just a few days after starting to use it. You can see the improvement in the clarity of the water and a reduction in algae build-up. If you have any phosphate-related issues in your tank, this product will definitely help. 5. Long-Lasting: While the bag is small, it goes a long way! The 100 mL lasts quite a while, and you can reuse it for multiple cycles. This makes it a cost-effective solution for keeping phosphate levels in check. 6. Great for Freshwater and Saltwater Tanks: I’ve used this in both my freshwater and saltwater aquariums with great success. Whether you’re managing a fish-only tank or a reef tank, this product works across the board. 7. Reliable Brand: Seachem is a brand I’ve trusted for years, and this product lived up to the high standards I’ve come to expect from them. Their products are always effective and reliable, and PhosGuard is no exception. Final Thoughts: If you’re battling high phosphate levels in your aquarium, Seachem PhosGuard is a must-have. It’s effective, easy to use, and safe for both fish and plants. The results are noticeable quickly, and I’ll definitely be keeping this product stocked in my aquarium maintenance supplies! 🌟 Highly recommend for anyone needing to reduce phosphates and improve water quality in their tank! ### ⭐⭐⭐⭐⭐ Helped reduce algae in my tank *by R***A on February 13, 2026* Been using this for a while and it has helped with the algae in my tank. While it comes already bagged for use in larger aquariums, I have a 20 gal and use it in smaller mesh bags in my HOB filter. I can't say enough how much the SeaChem products have improved my tank quality! Love my healthy tank and fish! ### ⭐⭐⭐⭐⭐ It is Very effective *by B***G on February 9, 2026* I started with 10ppm of phosphate in my 40 gallon tank. The first packet became saturated in about 4 days. I am on my second packet, and my reading is between 1ppm, and 0.5ppm. This was my target. I'll leave the packet in for a few more days and then replace it with Fluval ClearCarb to maintain my desired level. ## Frequently Bought Together - Seachem PhosGuard, 100 mL bagged - 67101850 - Seachem Indoor Purigen Organic Filtration Resin - Fresh and Saltwater 100 ml - Boyd Enterprises ABE16743 Chemipure Elite for Aquarium, 11.74-Ounce --- ## 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.dk/products/5505821-phosguard-100-ml-bagged-67101850](https://www.desertcart.dk/products/5505821-phosguard-100-ml-bagged-67101850) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-04-24*