--- product_id: 12204032 title: "ParaGuard 100 mL / 3.4 fl. oz." brand: "seachem" price: "165 kr" currency: DKK in_stock: true category: "Seachem" url: https://www.desertcart.dk/products/12204032-paraguard-100-ml-3-4-fl-oz store_origin: DK region: Denmark --- # Fresh & saltwater safe 10% aldehyde blend Fish & filter safe ParaGuard 100 mL / 3.4 fl. oz. **Brand:** seachem **Price:** 165 kr **Availability:** ✅ In Stock ## Summary > 🛡️ Protect your aquatic community with the safest, most effective parasite shield! ## Quick Answers - **What is this?** ParaGuard 100 mL / 3.4 fl. oz. by seachem - **How much does it cost?** 165 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/12204032-paraguard-100-ml-3-4-fl-oz) ## 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 - • **Trusted & Proven:** Highly rated with 4.6 stars and a top 300 rank in aquarium water treatments. - • **Safe for Fish & Filters:** No formaldehyde or methanol, preserving pH and aquatic life balance. - • **Hospital-Grade Treatment:** Ideal for quarantine, hospital, and receiving tanks to protect new arrivals. - • **Powerful Parasite Defense:** Eradicates ich, fungal, bacterial & viral lesions with a unique aldehyde formula. - • **Dual Environment Compatibility:** Perfectly formulated for both freshwater and marine tanks. ## Overview Seachem ParaGuard is a 100 mL liquid medication designed for freshwater and marine fish parasite control. It features a proprietary 10% aldehyde blend combined with malachite green and protective polymers, effectively treating ich and external infections without harming fish or filters. Safe for hospital and quarantine tanks, it avoids formaldehyde and pH disruption, making it a trusted choice for professional and hobbyist aquarists alike. ## Description ParaGuard is the only fish and filter safe aldehyde based (10% by weight) parasite control product available. Unlike highly toxic and difficult to use formalin based medications, ParaGuard contains no formaldehyde or methanol and will not alter pH. ParaGuard employs a proprietary, synergistic blend of aldehydes, malachite green, and fish protective polymers that effectively and efficiently eradicates many ectoparasites on fish (e.g. ich, etc.) and external fungal/bacterial/viral lesions (e.g., fin rot). It is particularly useful in hospital and receiving tanks for new fish and whenever new fish are introduced to a community tank. For use in freshwater or marine. ParaGuard is recommended for the treatment of certain diseases in marine and freshwater fish only. It IS NOT recommended for treating any style aquarium containing invertebrates, corals, crustaceans, or elasmobranchs (sharks and rays). ## Features - Fresh Or Saltwater Use - Parasite Control - Great in hospital and receiving tanks ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000255R3I | | ASIN | B000255R3I | | Allergen Information | Yam Free | | Best Sellers Rank | #30,591 in Pet Supplies ( See Top 100 in Pet Supplies ) #259 in Aquarium Water Treatments | | Brand Name | Seachem | | Customer Reviews | 4.6 4.6 out of 5 stars (1,708) | | Date First Available | June 20, 2004 | | Global Trade Identification Number | 00000116060509 | | Included Components | Seachem ParaGuard 100ml | | Item Form | Liquid | | Item Type Name | Medication | | Item Weight | 4.2 ounces | | Item model number | 001273 | | Liquid Volume | 100 ml | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer | Seachem Laboratories, Inc. | | Manufacturer Part Number | 605 | | Model Number | 001273 | | Number of Items | 1 | | Number of Packs | 1 | | Pet Type | Fish | | Product Dimensions | 0.16 x 1.61 x 0.16 inches; 4.2 ounces | | Target Species | Fish | | UPC | 015568977237 000116060509 | | Unit Count | 3.4 Fluid Ounces | ## Product Details - **Brand:** Seachem - **Item Form:** Liquid - **Item Weight:** 4.2 ounces - **Liquid Volume:** 100 ml - **Number of Packs:** 1 ## Images ![ParaGuard 100 mL / 3.4 fl. oz. - Image 1](https://m.media-amazon.com/images/I/71iZ+jt9cHL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: I have 1 gallon fish tank, how do i use this product? do I need to do a water change after first dips?** A: Seachem states: For 1 hour dips, use 3 mL per 4 L (1 gallon*). Dips may be extended if fish show no evidence of stress. It says nothing about a water change. **Q: Does this kill leeches and leech eggs? Will be used in quarantine buckets for plants and decorations, not the tank.** A: Malachite green whish is active ingredient kills them so in theory yes it should work. I've used it for hdras and flukes which both tend to be more hardy than leaches. **Q: Will this cause ammonia spike? Or, kill any beneficial bacteria?** A: I personally didn't have any problems. I used a half dosage twice a day and it worked well. I would use caution though with sensitive fish. **Q: I have 37 gallon tank and how many times do i use to cure the ich?** A: I used a capful for my 37 gallon tank and followed the instructions on the bottle for the amount of daily treatments. Hope this helps. It cleared my tank of ich and will take care of any parasites. If you have shrimp. etc it might be too strong for them...I only had fish. ## Frequently Bought Together - Seachem for external fungal/bacterial/viral lesions ParaGuard 100ml - Kordon Methylene Blue Disease Preventative – Safe for Freshwater & Saltwater Aquariums, Prevents Fungal Infections & Treats Parasites, Reduces Fish Stress, 4-Ounces - API LIQUID SUPER ICK CURE Fish remedy, Freshwater and Saltwater Fish Medication 4 fl oz(Pack of 1), White --- ## 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/12204032-paraguard-100-ml-3-4-fl-oz](https://www.desertcart.dk/products/12204032-paraguard-100-ml-3-4-fl-oz) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-09-22*