---
product_id: 3811514
title: "ParaGuard 250 mL / 8.5 fl. oz."
brand: "seachem"
price: "VT8109"
currency: VUV
in_stock: true
reviews_count: 13
category: "Seachem"
url: https://www.desertcart.vu/products/3811514-paraguard-250-ml-8-5-fl-oz
store_origin: VU
region: Vanuatu
---

# Safe for marine & freshwater 10% aldehyde blend Fish & filter safe formula ParaGuard 250 mL / 8.5 fl. oz.

**Brand:** seachem
**Price:** VT8109
**Availability:** ✅ In Stock

## Summary

> 🛡️ Defend your aquatic kingdom with ParaGuard – the ultimate fish health guardian!

## Quick Answers

- **What is this?** ParaGuard 250 mL / 8.5 fl. oz. by seachem
- **How much does it cost?** VT8109 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/3811514-paraguard-250-ml-8-5-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

- • **Filter & Fish Friendly:** Unique fish-protective polymers ensure zero harm to beneficial bacteria or filtration systems.
- • **Essential Quarantine Ally:** Ideal for hospital tanks and new arrivals—stop outbreaks before they start and protect your aquatic community.
- • **Powerful Parasite Eradication:** Clinically proven 10% aldehyde formula wipes out ich, fungal, bacterial & viral lesions fast.
- • **Stress-Free Treatment Routine:** Easy daily dosing with no need to remove charcoal or worry about sensitive shrimp and snails.
- • **Universal Aquarium Compatibility:** Perfectly safe for both marine and freshwater tanks—no pH disruption, no formaldehyde.

## Overview

Seachem ParaGuard is a 250 mL liquid treatment featuring a 10% aldehyde-based formula that safely eradicates ectoparasites, fungal, bacterial, and viral infections in both marine and freshwater fish. Unlike harsh formalin treatments, it’s fish, filter, and pH safe, making it the go-to solution for quarantine tanks and new fish introductions. Trusted by aquarists for rapid, effective parasite control without harming beneficial tank life.

## 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: ParaGuard Saved My Community Tank! - I noticed one of my fish had what looked like a fungal-type growth along with ich spots on its body. By the time I caught it, the infection was already pretty severe and unfortunately the fish did pass away. Most of my other fish were either unaffected or only had a few visible spots, maybe around 3–4 spots at most. The next morning, as soon as ParaGuard arrived, I started treatment. I was honestly nervous at first because I was worried it might stain the water, harm my plants, or crash my beneficial bacteria. To help support the tank, I also dosed Brightwell Aquatics MicroBacter Start alongside the ParaGuard. I monitored the tank closely and tested the water daily. Throughout treatment my ammonia, nitrite, and nitrate all stayed at 0 ppm, which was a huge relief. I also raised the tank temperature to around 81°F to help speed up the ich life cycle. Within 24 hours, I could no longer see visible ich spots on any of the fish. I still continued dosing every 24 hours for about a week to make sure any remaining parasites in the water column were eliminated. In my experience, ParaGuard worked quickly and effectively for a mild-to-moderate outbreak, especially in a planted community tank with sensitive fish and shrimp. I can’t say how it would perform in a very severe tank-wide outbreak, but based on my experience I would definitely recommend it.
Review: Great for ick and fin rot - but usually takes 3 days to work - I get most of my fish through mail order. By the time they get to me they are often starting to show symptoms of any disease they've EVER been exposed to. This helps. I have successfully treated fish with ich, fin rot and body fungus. You do need to keep the treatments up, though - just putting in a dose for one day won't be enough. The directions are to use one capful for every 10 gallons daily. "Repeat as long as required as long as fish show no signs of stress." You can also use this as a preventative dip for new fish (which I highly, HIGHLY recommend) by putting half a capful per gallon of the dip. The good news is that not only do you not have to take the charcoal out of your filter and you do not have to worry about snails or shrimp, either. I did a heavy series of doses on one tank that had cherry shrimp in it, and not one died or even looked sick. If you keep fish, you really need to have medications on hand to treat them when something breaks out. Early treatment is key. I keep this and maracyn 2 on hand so I can nip diseases in the bud. Prazipro has a good reputation, too, but I have not tried that. Maybe there is a better broad spectrum treatment available than ParaGuard, but I have not found it yet. I would definitely like to hear people's feedback if they've found something that works better. By the way, this is what the bottle says: "ParaGuard is the only fish and filter safe aldehyde based (10% by weight) parasite control product available... contains no formaldehyde or methanol and will not alter pH... employs a blend of aldehydes, malachite green and fish protective polymers... effectively eradicates many ectoparasites (ich, etc) and external fungal/bacterial/viral lesions (eg, fin rot)."

## Features

- Eradicates ectoparasites, fungal, bacterial, viral lesions
- Safe alternative to formalin
- For marine and freshwater use
- Parasite control

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Allergen Information | Yam Free |
| Brand | Seachem |
| Item Form | Liquid |
| Item Weight | 8.5 ounces |
| Liquid Volume | 250 ml |
| Manufacturer | Seachem Laboratories, Inc. |
| Pet Type | Fish |
| Target Species | Fish |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Seachem
- **Item Form:** Liquid
- **Item Weight:** 8.5 ounces
- **Liquid Volume:** 250 ml
- **Unit Count:** 1 Count

## Images

![ParaGuard 250 mL / 8.5 fl. oz. - Image 1](https://m.media-amazon.com/images/I/51-bajdgvWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ ParaGuard Saved My Community Tank!
*by J***N on May 27, 2026*

I noticed one of my fish had what looked like a fungal-type growth along with ich spots on its body. By the time I caught it, the infection was already pretty severe and unfortunately the fish did pass away. Most of my other fish were either unaffected or only had a few visible spots, maybe around 3–4 spots at most. The next morning, as soon as ParaGuard arrived, I started treatment. I was honestly nervous at first because I was worried it might stain the water, harm my plants, or crash my beneficial bacteria. To help support the tank, I also dosed Brightwell Aquatics MicroBacter Start alongside the ParaGuard. I monitored the tank closely and tested the water daily. Throughout treatment my ammonia, nitrite, and nitrate all stayed at 0 ppm, which was a huge relief. I also raised the tank temperature to around 81°F to help speed up the ich life cycle. Within 24 hours, I could no longer see visible ich spots on any of the fish. I still continued dosing every 24 hours for about a week to make sure any remaining parasites in the water column were eliminated. In my experience, ParaGuard worked quickly and effectively for a mild-to-moderate outbreak, especially in a planted community tank with sensitive fish and shrimp. I can’t say how it would perform in a very severe tank-wide outbreak, but based on my experience I would definitely recommend it.

### ⭐⭐⭐⭐⭐ Great for ick and fin rot - but usually takes 3 days to work
*by R***R on October 6, 2012*

I get most of my fish through mail order. By the time they get to me they are often starting to show symptoms of any disease they've EVER been exposed to. This helps. I have successfully treated fish with ich, fin rot and body fungus. You do need to keep the treatments up, though - just putting in a dose for one day won't be enough. The directions are to use one capful for every 10 gallons daily. "Repeat as long as required as long as fish show no signs of stress." You can also use this as a preventative dip for new fish (which I highly, HIGHLY recommend) by putting half a capful per gallon of the dip. The good news is that not only do you not have to take the charcoal out of your filter and you do not have to worry about snails or shrimp, either. I did a heavy series of doses on one tank that had cherry shrimp in it, and not one died or even looked sick. If you keep fish, you really need to have medications on hand to treat them when something breaks out. Early treatment is key. I keep this and maracyn 2 on hand so I can nip diseases in the bud. Prazipro has a good reputation, too, but I have not tried that. Maybe there is a better broad spectrum treatment available than ParaGuard, but I have not found it yet. I would definitely like to hear people's feedback if they've found something that works better. By the way, this is what the bottle says: "ParaGuard is the only fish and filter safe aldehyde based (10% by weight) parasite control product available... contains no formaldehyde or methanol and will not alter pH... employs a blend of aldehydes, malachite green and fish protective polymers... effectively eradicates many ectoparasites (ich, etc) and external fungal/bacterial/viral lesions (eg, fin rot)."

### ⭐⭐⭐⭐⭐ If u suspect parasites in your aquarium, try Paraguard BEFORE strong medications
*by A***N on October 20, 2018*

ParaGuard is an awesome aid for any fish enthusiast. I like how it can be used in the entire tank (no hospital/quarantine tanks), that it dissipates after a couple of days (requires daily additions until problems resolve), because it wont interfere with your filter media in canister or other filters, AND because it's not a strong antibiotic thatd potentially harm other fish that arent sick. SeaChems medications such as Kanaplex or Metroplex are very good medications to use AFTER 50% water changes higher temperature or Epsom Salts, or ParaGuard seem to not be as effective 1st few days. Can be added into food for easier absorption as well or in water column to reach gills. If fish seem very sick, then these medications are the ones to use in a hospital/quarantine tank if wanting to avoid treating entire tank. All of SeaChem products are legit (I wish they paid me lol) as I've used them for well over 10yrs. Started off with Prime, the ONLY water conditioner aquarisuts should honestly use, GarlicGuard food supplement is extremely effective and keeps fish immunity elevated throughout life, ParaGuard for the reasons mentioned above, etc. If I had 1 brand to use for my fish, u bet its SeaChem. The good customer service is also an added bonus :) Lastly folks, feed your fish SOAKED FISH FOOD in water or Garlic Guard (soften pellets, absolutely NO HARD FOOD!) along with some peas ONCE A WEEK to avoid any SWIMBLADDER ISSUES as this event is bad for a fish that cant orient itself. Pea fiber will flush out their bladders and preventing this EASILY PREVENTABLE illness. This along with weekly 50% water changes should prevent roughly 75% of potential problems. Other 25% remains in how many fish are stocked, if all fish are compatible, etc as there are many variable to consider in aquariums inclusive of water source... that's where my Prime comes in hehe :)

## Frequently Bought Together

- Seachem ParaGuard 250ml
- Seachem StressGuard Slime Coat Protection - Stress and Toxic Ammonia Reducer 500 ml
- Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-08-14*