---
product_id: 91562930
title: "Fritz Aquatics Mardel - Coppersafe - 16oz"
brand: "fritz"
price: "€ 102.79"
currency: EUR
in_stock: true
reviews_count: 5
category: "Fritz"
url: https://www.desertcart.nl/products/91562930-fritz-aquatics-mardel-coppersafe-16oz
store_origin: NL
region: Netherlands
---

# Safe for fresh & saltwater tanks Live nitrifying bacteria eliminates ammonia & nitrates Treats 376 gallons per 16oz Fritz Aquatics Mardel - Coppersafe - 16oz

**Brand:** fritz
**Price:** € 102.79
**Availability:** ✅ In Stock

## Summary

> 🛡️ Defend your aquatic world with Mardel Coppersafe — the pro’s choice for parasite-free tanks!

## Quick Answers

- **What is this?** Fritz Aquatics Mardel - Coppersafe - 16oz by fritz
- **How much does it cost?** € 102.79 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/91562930-fritz-aquatics-mardel-coppersafe-16oz)

## Best For

- fritz enthusiasts

## Why This Product

- Trusted fritz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stable, non-staining formula:** Keeps aquarium water crystal clear and vibrant
- • **Long-lasting copper protection:** Remains active for over 30 days, minimizing tank disruption
- • **Broad-spectrum parasite defense:** Effectively combats Ich, flukes, anchor worms & velvet
- • **No carbon filter removal needed:** Simplifies treatment without compromising filtration
- • **Supports healthy nitrogen cycle:** Live bacteria reduce harmful ammonia and nitrates

## Overview

Fritz Aquatics Mardel Coppersafe is a 16oz liquid treatment designed to protect up to 376 gallons of fresh or saltwater aquarium. It delivers stable, long-lasting copper ions to eradicate external parasites like Ich and flukes without staining or removing carbon filtration. Enhanced with live nitrifying bacteria, it also supports water quality by eliminating ammonia and nitrates, ensuring a healthier environment for all fish species.

## Description

Product Description For infections of: Ich, flukes (Gyrodactylus), anchor worms, velvet/protozoan diseases and other external parasites. Ichthyophthirius (Ich) – white spot disease is caused by a parasite that attacks all freshwater and saltwater fish species. The fish appears to be covered by numerous white spots. The parasite is easily transmitted from one fish to another. Ich can only be controlled in the free-swimming stage of the parasite. Five to 30 days may be needed before the infestation is completely eradicated. Copper safe solution remains active for over one month in the aquarium. It is a safe, stable, non-staining concentrate that does not color aquarium water. Be sure to add copper safe solution to replacement water when water changes are made. This will maintain the therapeutic level of copper safe solution. Because copper safe solution is so stable in water, partial water changes are the quickest way to remove it from the water. Ingredients All-Natural P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Directions See directions on package See more

Review: Excellent product
Review: I first began to use Mardel Coppersafe in the 1990s for freshwater aquarium fish. Typically the use of this product was brought on by adding a new (non-quarantined) fish. (I was in college back then and didn't have the room to set up a dedicated quarantine tank, which is the recommended way of introducing new fish after they have passed a 2-3 week isolation without incident.) In recent years this product has become harder to find in local fish stores. When I finally located it here on desertcart I was shocked to see how pricey it has become. Due to that sticker shock I stuck with treatments that were not really working — and very nearly lost my fish. In hindsight, especially for those of you who need to treat a larger display tank vs. a hospital tank, this product is well worth the money. I wasted a lot of time — and even more money, in the end — on locally-available treatments by API (General Cure) and Kordon (Rid Ich Plus and Ich Attack) before I checked here on desertcart. What's unique about this product is that you dose to the appropriate level per the directions on the bottle and A) you don't have to remove the carbon filtration material, as is required of other medications, and B) you don't have to perform repeated water changes and re-dose during treatment. In fact, the directions expressly indicate that one is to refrain from water changes for 30 days upon dosing. (A word to the wise, however: If you use this product make sure to do a very large water change beforehand because it's the only cleaning your fish tank will have for the next 30!) To make sure this product was tolerated by my catfish (pleco and a pictus cat), I broke the dose into thirds and dosed very other day. I used API's Copper test kit to verify that the dose was correct at the end of that process. API's test strips indicated that I was on the low side at what should have been full dose — but not so far off that I felt comfortable going beyond what the Coppersafe label directed. Instead, I gauged the results by fish behavior. And let me tell you — the change within 24 hours of the first does, let alone upon reaching full-strength, was dramatic. I had suspected initially that my fish were suffering from Ich but the characteristic white spots never showed up. The flashing was the only initial symptom. After that, the fin clamping, listlessness and anorexia (not eating) set in. This was followed by labored breathing (rapid gill movement). Fish breathing, despite added aeration, was made significantly worse by Formalin/Malachite-green containing treatment (i.e. Rid Ich Plus), which is why I switched out that first Kordon product for their herbal "Ich Attack" — a smelly product that turned the water brown but yielded no change. After that, I performed a third sizeable water change and initiated Hikari's PraziPro. When that didn't work, another water change followed at which point I treated with API's General Cure. That didn't work, either! Weeks into this ordeal, I still didn't know if I was dealing with Costia or a fluke infestation. Meanwhile, all these water changes during and between treatments added to the stress my already-sick fish endured. By the time I introduced Coppersafe my fish had been ill for a month. One, in particular, was severely weakened and about to give up the ghost. In a final "hail Mary" I used Kordon's Methlyene Blue as a 10-second dip, which I am happy to report stabilized the most seriously ill fish (respiration came back to normal within two hours). I then changed out a significant amount of water and introduced the Coppersafe the following day. Within three days the fin-clamping was no more and all fish were eating normally. Within a week there was no more flashing. I am now 30 days out and can say that this treatment has been a resounding success. I am so thankful it can still be found on the market. In conclusion, you will read a lot on the various websites dedicated to this hobby about the risks associated with using copper-based treatments. That is because copper, like all metals, is toxic to fish. Like any product, following the directions to a "T" is of paramount importance. If you are especially paranoid, split the recommended dose in half (or thirds) and verify that there are no adverse reaction prior to adding the next dose. For what it's worth, my own experience suggests that while Malachite Green/Formalin containing products are generally considered safer they are under-estimated in aquarium circles for the respiratory toxins they are. In these situations — where you are sure that a parasite is to blame but not entirely clear on what kind — Coppersafe is the way to go. The icing on the cake is the fact that this treatment is one of the least time-consuming and disruptive to your fish at an already stressful time.

## Features

- Treats 376 gallons
- Not for use in reef aquariums
- For use in fresh and Saltwater tanks
- Live Nitrifying Bacteria eliminates Ammonia and Nitrates

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00OTH6914 |
| Allergen Information | Beef |
| Batteries Included | No |
| Batteries required | No |
| Best Sellers Rank | 387,934 in Pet Supplies ( See Top 100 in Pet Supplies ) 2,679 in Aquarium Water Treatments 7,918 in Dog Biscuits & Snacks |
| Breed Recommendation | All Breed Sizes |
| Colour | Multi-colored |
| Customer Reviews | 4.6 4.6 out of 5 stars (521) |
| Date First Available | 5 Jan. 2015 |
| Flavor | Fish |
| Item Form | Liquid |
| Item Weight | 454 g |
| Item model number | 42060 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Product Dimensions | 22.07 x 6.5 x 6.5 cm; 453.59 g |
| Quantity | 1 |
| Size | 16-ounce |
| Specific Uses | Active |
| Volume | 473 Millilitres |

## Product Details

- **Brand:** Fritz
- **Item form:** Liquid
- **Item weight:** 454 g
- **Liquid volume:** 16 Fluid Ounces
- **Manufacturer:** Fritz Aquatics

## Images

![Fritz Aquatics Mardel - Coppersafe - 16oz - Image 1](https://m.media-amazon.com/images/I/61xaPB0v7zL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***S on 12 May 2025*

Excellent product

### ⭐⭐⭐⭐⭐ Review
*by N***W on 14 September 2018*

I first began to use Mardel Coppersafe in the 1990s for freshwater aquarium fish. Typically the use of this product was brought on by adding a new (non-quarantined) fish. (I was in college back then and didn't have the room to set up a dedicated quarantine tank, which is the recommended way of introducing new fish after they have passed a 2-3 week isolation without incident.) In recent years this product has become harder to find in local fish stores. When I finally located it here on Amazon I was shocked to see how pricey it has become. Due to that sticker shock I stuck with treatments that were not really working — and very nearly lost my fish. In hindsight, especially for those of you who need to treat a larger display tank vs. a hospital tank, this product is well worth the money. I wasted a lot of time — and even more money, in the end — on locally-available treatments by API (General Cure) and Kordon (Rid Ich Plus and Ich Attack) before I checked here on Amazon. What's unique about this product is that you dose to the appropriate level per the directions on the bottle and A) you don't have to remove the carbon filtration material, as is required of other medications, and B) you don't have to perform repeated water changes and re-dose during treatment. In fact, the directions expressly indicate that one is to refrain from water changes for 30 days upon dosing. (A word to the wise, however: If you use this product make sure to do a very large water change beforehand because it's the only cleaning your fish tank will have for the next 30!) To make sure this product was tolerated by my catfish (pleco and a pictus cat), I broke the dose into thirds and dosed very other day. I used API's Copper test kit to verify that the dose was correct at the end of that process. API's test strips indicated that I was on the low side at what should have been full dose — but not so far off that I felt comfortable going beyond what the Coppersafe label directed. Instead, I gauged the results by fish behavior. And let me tell you — the change within 24 hours of the first does, let alone upon reaching full-strength, was dramatic. I had suspected initially that my fish were suffering from Ich but the characteristic white spots never showed up. The flashing was the only initial symptom. After that, the fin clamping, listlessness and anorexia (not eating) set in. This was followed by labored breathing (rapid gill movement). Fish breathing, despite added aeration, was made significantly worse by Formalin/Malachite-green containing treatment (i.e. Rid Ich Plus), which is why I switched out that first Kordon product for their herbal "Ich Attack" — a smelly product that turned the water brown but yielded no change. After that, I performed a third sizeable water change and initiated Hikari's PraziPro. When that didn't work, another water change followed at which point I treated with API's General Cure. That didn't work, either! Weeks into this ordeal, I still didn't know if I was dealing with Costia or a fluke infestation. Meanwhile, all these water changes during and between treatments added to the stress my already-sick fish endured. By the time I introduced Coppersafe my fish had been ill for a month. One, in particular, was severely weakened and about to give up the ghost. In a final "hail Mary" I used Kordon's Methlyene Blue as a 10-second dip, which I am happy to report stabilized the most seriously ill fish (respiration came back to normal within two hours). I then changed out a significant amount of water and introduced the Coppersafe the following day. Within three days the fin-clamping was no more and all fish were eating normally. Within a week there was no more flashing. I am now 30 days out and can say that this treatment has been a resounding success. I am so thankful it can still be found on the market. In conclusion, you will read a lot on the various websites dedicated to this hobby about the risks associated with using copper-based treatments. That is because copper, like all metals, is toxic to fish. Like any product, following the directions to a "T" is of paramount importance. If you are especially paranoid, split the recommended dose in half (or thirds) and verify that there are no adverse reaction prior to adding the next dose. For what it's worth, my own experience suggests that while Malachite Green/Formalin containing products are generally considered safer they are under-estimated in aquarium circles for the respiratory toxins they are. In these situations — where you are sure that a parasite is to blame but not entirely clear on what kind — Coppersafe is the way to go. The icing on the cake is the fact that this treatment is one of the least time-consuming and disruptive to your fish at an already stressful time.

### ⭐⭐⭐⭐⭐ Review
*by S***N on 11 February 2018*

Gentler on fish than Cupramine. Excellent product. Make sure you use it with a compatible copper test kit. I use API, which is compatible, and is an easy test to perform (no long waits). This is my go to copper product for commercial use.

## Frequently Bought Together

- Fritz Aquatics Fritz Mardel - Coppersafe - 16oz
- API AQUARIUM SALT Freshwater Aquarium Salt 65-Ounce Box
- API MELAFIX Freshwater Fish Bacterial Infection Remedy 16-Ounce Bottle

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-23*