--- product_id: 12204032 title: "Seachem ParaGuard 100 mL / 3.4 fl. oz." brand: "seachem" price: "€ 35.29" currency: EUR in_stock: true reviews_count: 13 category: "Seachem" url: https://www.desertcart.hr/products/12204032-seachem-paraguard-100-ml-3-4-fl-oz store_origin: HR region: Croatia --- # Ideal for hospital & quarantine tanks Safe for fresh & saltwater 10% aldehyde parasite control Seachem ParaGuard 100 mL / 3.4 fl. oz. **Brand:** seachem **Price:** € 35.29 **Availability:** ✅ In Stock ## Summary > 🛡️ Protect your aquatic community with the ultimate parasite shield! ## Quick Answers - **What is this?** Seachem ParaGuard 100 mL / 3.4 fl. oz. by seachem - **How much does it cost?** € 35.29 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/12204032-seachem-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 - • **Advanced Aldehyde Formula:** 10% aldehyde blend with malachite green targets ich, fungal, bacterial, and viral infections without harming fish or filters. - • **Fish-Friendly & pH Stable:** No formaldehyde or methanol, maintaining stable water chemistry and fish health. - • **Quarantine Tank Essential:** Perfect for hospital and receiving tanks to protect new arrivals and prevent outbreaks. - • **Easy Dosing with Precision:** Convenient cap dosing (1 cap per 10 gallons) for hassle-free, accurate treatment. - • **Dual-Environment Powerhouse:** Effective in both freshwater and marine tanks, ensuring versatile parasite defense. ## Overview Seachem ParaGuard is a 100 mL liquid treatment designed for freshwater and marine aquariums, delivering a safe, aldehyde-based formula that eradicates parasites, fungal, bacterial, and viral infections without altering pH or harming fish and filters. Ideal for hospital and quarantine tanks, it ensures new fish introductions stay healthy and your aquatic ecosystem thrives. ## 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). Review: Go to fish disease cure - Works very well. A must for all quarintine tanks. 7 to 10 days of treatment and your fish are healthy and happy. Use in combination with Kanaplex and Metroplex but make sure you have somthing putting bubbles in your tank. The medication depletes the oxygen levels in the water. Kills ick, fungal infections (fin rot), and other bacterial infections fish can get. I like to feed the kanaplex and metroplex with focus and the garlic guard and use the paraguard for external treatment. The packaging is good. easy to measure doses with the cap, with 1 capful per 10 gallons. Always medicate a smaller aquarium or it'll get expensive to cure your fish. I use a 20 gallon to quarintine my fish in. I service aquariums for a living. This is a go to for fish doctoring. This medication does have a unique smell. Its not a bad smell, it doesnt bother or turn anyone off to using it. Like all fish medications the price is questionable. Usually higher than wanted. But so is everything else. Review: Good product - Works but good to dose every day foe at least a week.use half dose for scallops fish and monitor plants ## Features - Fresh Or Saltwater Use - Parasite Control - Great in hospital and receiving tanks ## Technical Specifications | Specification | Value | |---------------|-------| | Allergen Information | Yam Free | | Brand | Seachem | | Item Form | Liquid | | Item Weight | 4.2 ounces | | Liquid Volume | 100 ml | | Number of Packs | 1 | | Pet Type | Fish | | Target Species | Fish | | 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 ![Seachem 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Go to fish disease cure *by W***M on March 17, 2026* Works very well. A must for all quarintine tanks. 7 to 10 days of treatment and your fish are healthy and happy. Use in combination with Kanaplex and Metroplex but make sure you have somthing putting bubbles in your tank. The medication depletes the oxygen levels in the water. Kills ick, fungal infections (fin rot), and other bacterial infections fish can get. I like to feed the kanaplex and metroplex with focus and the garlic guard and use the paraguard for external treatment. The packaging is good. easy to measure doses with the cap, with 1 capful per 10 gallons. Always medicate a smaller aquarium or it'll get expensive to cure your fish. I use a 20 gallon to quarintine my fish in. I service aquariums for a living. This is a go to for fish doctoring. This medication does have a unique smell. Its not a bad smell, it doesnt bother or turn anyone off to using it. Like all fish medications the price is questionable. Usually higher than wanted. But so is everything else. ### ⭐⭐⭐⭐⭐ Good product *by K***N on June 25, 2026* Works but good to dose every day foe at least a week.use half dose for scallops fish and monitor plants ### ⭐⭐⭐⭐⭐ Really works! *by S***N on May 30, 2026* This is amazing it saved my fish. I thought my fish was dead last night, he was covered in some grey film and barely breathing. I did a water change and added this medicine and he is perfect today. So happy ## 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.hr/products/12204032-seachem-paraguard-100-ml-3-4-fl-oz](https://www.desertcart.hr/products/12204032-seachem-paraguard-100-ml-3-4-fl-oz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-13*