---
product_id: 48226939
title: "Seachem Purigen for Freshwater, 100 ml"
brand: "seachem"
price: "R504"
currency: ZAR
in_stock: true
reviews_count: 8
category: "Seachem"
url: https://www.desertcart.co.za/products/48226939-seachem-purigen-for-freshwater-100-ml
store_origin: ZA
region: South Africa
---

# 100ml high-capacity resin Removes ammonia, nitrite & nitrate Reusable with bleach regeneration Seachem Purigen for Freshwater, 100 ml

**Brand:** seachem
**Price:** R504
**Availability:** ✅ In Stock

## Summary

> 💎 Elevate your aquarium game with HD clarity that turns heads

## Quick Answers

- **What is this?** Seachem Purigen for Freshwater, 100 ml by seachem
- **How much does it cost?** R504 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/48226939-seachem-purigen-for-freshwater-100-ml)

## 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

- • **Universal filter fit:** Works seamlessly in canisters, HOBs, sumps & internals
- • **Smart color indicator:** Darkens as it exhausts, signaling easy regeneration time
- • **Ultimate organic removal:** Highest capacity for dissolved organics, tannins & odors
- • **Crystal-clear water, fast:** Transforms tea-stained tanks to sparkling clarity in 24-48 hours
- • **Cost-effective & eco-friendly:** Reusable resin saves money and reduces waste

## Overview

Seachem Purigen 100ml is a premium synthetic polymer resin designed for freshwater aquariums that rapidly removes dissolved organics, ammonia, nitrites, nitrates, and tannins. It delivers crystal-clear, odor-free water within 1-2 days without altering essential water chemistry. The resin darkens as it exhausts, providing a visual cue for regeneration, which is simple and cost-effective using household bleach. Compatible with most filter types, Purigen offers long-lasting performance and multiple reuse cycles, making it the go-to solution for professional-grade aquarium water polishing.

## Description

Product Description Seachem Purigen 100Ml Directions 1. Use Purigen in your filter to remove soluble and insoluble impurities from water. 2. For marine and freshwater use. 3. Purigen controls ammonia, nitrites, and nitrates by removing nitrogenous organic waste. 4. It significantly raises redox and polishes water to unparalleled clarity. 5. Purigen darkens progressively as it exhausts. 6. To regenerate Purigen, soak it in a 1:1 bleach:water solution for 24 hours in a non-metallic container in a well-ventilated area and away from children. 7. Use regular 8.25% hypochlorite household bleach (non-scented, no dyes, do not use a splash-less bleach). 8. Rinse well, then soak for 8 hours with a solution containing 4 tablespoons of Prime or equivalent dechlorinator per cup of water. 9. Rinse well. For freshwater use, soak for 4 hours with a solution containing 2 tablespoons of buffer per cup of water. 10. Original color and full activity should now be restored, and Purigen is ready for reuse. 11. Do not reuse if an odor of bleach/chlorine is detectable. In case of doubt, soak beads in a small quantity of water and test for residual chlorine with a chlorine test kit. Box Contains water treatment

Review: HD quality water! - Seachem Purigen – my “HD water” upgrade for crystal‑clear tanks Purigen is the product I reach for when I want that next level of polish. It consistently strips out the dissolved organics that make water look tired—tannins, slight yellowing, and odours—without flattening the life out of a planted or community tank. The end result is that crisp, glassy clarity that makes colours pop and hardscape look like it’s floating. What I notice in real use Immediate visual lift: Within days the water shifts from “clean” to sparkling, with noticeably better light penetration and contrast. Less film and odour: Surface sheen and any faint musty smell are dialled right down. Stable chemistry: It targets dissolved organics rather than stripping essential minerals; I’ve not seen it upset parameters when used as directed. Where it fits in the filter Pop Purigen in a fine media bag and place it towards the end of the flow path, after mechanical (sponges/floss) and bio (e.g., ceramic/Matrix) stages. Clean water hitting Purigen = better contact time and longer life. Don’t pack it too tightly—let water flow through rather than around it. Maintenance & regeneration (simple and cost‑effective) It changes colour from off‑white to dark brown/black as it’s exhausted. That’s your cue to recharge. Follow the label: bleach‑soak to regenerate, then thoroughly neutralise with a dechlorinator and rinse before returning it to the tank. (Pause UV/ozone during this step and never mix bleach with any other chemicals.) Because it’s reusable for multiple cycles, it’s great value, especially if you run several aquariums. Tips from day‑to‑day use Pair it with solid mechanical pre‑filtration; the less gunk hitting Purigen, the longer it lasts. If you want a mild tannin tint (e.g., for a blackwater look), use a smaller pouch or remove Purigen after the water looks how you like it. It works across canisters, HOBs, internals, and sumps—just keep it in a tight, fine bag so granules don’t escape. Verdict If biological media is the engine of your filtration, Purigen is the finishing filter that gives you that “show tank” shine. It’s my go‑to for high‑definition water, fast cosmetic improvements, and long‑term polish without constant replacements. For me, it’s a simple, reliable upgrade that makes every aquarium look its best.
Review: Crystal-clear results—removes tannins, organics, and cloudiness with zero faff or chemical drama. - Dropped this into a 120L planted tank running a canister filter—water went from tea-stained to glass-clear in under 48 hours. It targets dissolved organics, not just visible muck, so it’s ideal for setups with driftwood, heavy feeding, or cloudy water issues. Comes pre-packed in a mesh pouch—no measuring, no mess. Just rinse, drop into your filter tray or media basket, and let it work. I’ve used it in both RTA-style filters and hang-ons—no flow restriction, no breakdown. 🔍 Specs & Features Size: 100ml pouch (treats up to ~400L depending on bioload) Type: Synthetic polymer resin Use: Freshwater only (this version) Function: Removes tannins, ammonia, nitrites, nitrates, and dissolved organics Regeneration: Can be cleaned and reused with bleach (instructions provided) 🧪 Performance Clarity: Noticeable improvement in 24–48 hours Smell: Reduces tank odour Colour: Clears brown tint from driftwood setups Longevity: Lasts 4–6 weeks depending on load Reusability: Can be regenerated multiple times—saves cost long-term 👍 Pros ✅ Clears water fast—removes organics and tannins ✅ Pre-packed—no mess, no measuring ✅ Reusable—regenerates with bleach ✅ No impact on pH or hardness ✅ Works in most filter types 👎 Cons ❌ Needs bleach for regeneration—follow safety steps ❌ Doesn’t remove heavy metals or meds ❌ Can clog if used in very dirty tanks—pre-filter recommended ❌ Not a substitute for water changes 🧭 Personal Verdict If you want crystal-clear water without chemical dosing or constant maintenance, Purigen earns its spot. I’ve used it in planted tanks, fry setups, and even shrimp tanks—no drama, just clean results. It’s proper gear for anyone who wants clarity without compromise.

## Features

- Highest organic removal capacity
- Helps control ammonia/nitrite/nitrate
- Colour changes as it exhausts; easily regenerated
- Model number: 020230

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002A5VK2 |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | 1,291 in Pet Supplies ( See Top 100 in Pet Supplies ) 8 in Aquarium Water Treatments |
| Brand | Seachem |
| Brand Name | Seachem |
| Country Of Origin | USA |
| Customer Reviews | 4.7 out of 5 stars 16,549 Reviews |
| Global Trade Identification Number | 00000116016506 |
| Item Form | Resin |
| Item Weight | 2.1 Ounces |
| Item form | Resin |
| Item weight | 2.1 Ounces |
| Liquid Volume | 100 Millilitres |
| Liquid volume | 100 Millilitres |
| Manufacturer | Seachem |
| Pet Type | Fish |
| Target Species | Aquarium Water |
| UPC | 000116016506 |
| Unit Count | 100.0 millilitre(s) |

## Product Details

- **Brand:** Seachem
- **Item form:** Resin
- **Item weight:** 2.1 Ounces
- **Liquid volume:** 100 Millilitres
- **Manufacturer:** Seachem

## Images

![Seachem Purigen for Freshwater, 100 ml - Image 1](https://m.media-amazon.com/images/I/71c7GlRaoNL.jpg)
![Seachem Purigen for Freshwater, 100 ml - Image 2](https://m.media-amazon.com/images/I/91g7eg7+EsL.jpg)
![Seachem Purigen for Freshwater, 100 ml - Image 3](https://m.media-amazon.com/images/I/714keBQlKFL.jpg)
![Seachem Purigen for Freshwater, 100 ml - Image 4](https://m.media-amazon.com/images/I/81iuE4Wr7RL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Can you tell me if this product (Purigen) will remove Blackwater from my aquarium.**
A: what I had is tea colour from the wood, it has been remove perfectly

**Q: Can i use nt labs plastic plant cleaner to regenerate instead of bleach ? the nt land cleaner does smell of bleach**
A: I wouldn't recommend doing that just because some chemicals may turn toxic using purigen and later released into the water. I would personally use the bleach recommended. It's cheap as well with cheap bleach costing like 30p.

**Q: How do I regenerate my bag, I know it's got to be soaked in bleach, but how long for and what is best to remove the bleach from the bag?**
A: Bleach to water ratio 1:1 then rinse after 24hours, soak for another 24 hours using a dechlorinator and r/o water! It should then be rinsed thoroughly it may smell fishy but that’s normal! Seachem dechlorinator is dear I use one off eBay!

**Q: Can this be used with fluval u3 filter thanks**
A: No, there isn't space inside that filter for it. Ideally you need an external canister filter for this item.

## Customer Reviews

### ⭐⭐⭐⭐⭐ HD quality water!
*by P***O on 15 January 2026*

Seachem Purigen – my “HD water” upgrade for crystal‑clear tanks Purigen is the product I reach for when I want that next level of polish. It consistently strips out the dissolved organics that make water look tired—tannins, slight yellowing, and odours—without flattening the life out of a planted or community tank. The end result is that crisp, glassy clarity that makes colours pop and hardscape look like it’s floating. What I notice in real use Immediate visual lift: Within days the water shifts from “clean” to sparkling, with noticeably better light penetration and contrast. Less film and odour: Surface sheen and any faint musty smell are dialled right down. Stable chemistry: It targets dissolved organics rather than stripping essential minerals; I’ve not seen it upset parameters when used as directed. Where it fits in the filter Pop Purigen in a fine media bag and place it towards the end of the flow path, after mechanical (sponges/floss) and bio (e.g., ceramic/Matrix) stages. Clean water hitting Purigen = better contact time and longer life. Don’t pack it too tightly—let water flow through rather than around it. Maintenance & regeneration (simple and cost‑effective) It changes colour from off‑white to dark brown/black as it’s exhausted. That’s your cue to recharge. Follow the label: bleach‑soak to regenerate, then thoroughly neutralise with a dechlorinator and rinse before returning it to the tank. (Pause UV/ozone during this step and never mix bleach with any other chemicals.) Because it’s reusable for multiple cycles, it’s great value, especially if you run several aquariums. Tips from day‑to‑day use Pair it with solid mechanical pre‑filtration; the less gunk hitting Purigen, the longer it lasts. If you want a mild tannin tint (e.g., for a blackwater look), use a smaller pouch or remove Purigen after the water looks how you like it. It works across canisters, HOBs, internals, and sumps—just keep it in a tight, fine bag so granules don’t escape. Verdict If biological media is the engine of your filtration, Purigen is the finishing filter that gives you that “show tank” shine. It’s my go‑to for high‑definition water, fast cosmetic improvements, and long‑term polish without constant replacements. For me, it’s a simple, reliable upgrade that makes every aquarium look its best.

### ⭐⭐⭐⭐⭐ Crystal-clear results—removes tannins, organics, and cloudiness with zero faff or chemical drama.
*by G***E on 21 September 2025*

Dropped this into a 120L planted tank running a canister filter—water went from tea-stained to glass-clear in under 48 hours. It targets dissolved organics, not just visible muck, so it’s ideal for setups with driftwood, heavy feeding, or cloudy water issues. Comes pre-packed in a mesh pouch—no measuring, no mess. Just rinse, drop into your filter tray or media basket, and let it work. I’ve used it in both RTA-style filters and hang-ons—no flow restriction, no breakdown. 🔍 Specs & Features Size: 100ml pouch (treats up to ~400L depending on bioload) Type: Synthetic polymer resin Use: Freshwater only (this version) Function: Removes tannins, ammonia, nitrites, nitrates, and dissolved organics Regeneration: Can be cleaned and reused with bleach (instructions provided) 🧪 Performance Clarity: Noticeable improvement in 24–48 hours Smell: Reduces tank odour Colour: Clears brown tint from driftwood setups Longevity: Lasts 4–6 weeks depending on load Reusability: Can be regenerated multiple times—saves cost long-term 👍 Pros ✅ Clears water fast—removes organics and tannins ✅ Pre-packed—no mess, no measuring ✅ Reusable—regenerates with bleach ✅ No impact on pH or hardness ✅ Works in most filter types 👎 Cons ❌ Needs bleach for regeneration—follow safety steps ❌ Doesn’t remove heavy metals or meds ❌ Can clog if used in very dirty tanks—pre-filter recommended ❌ Not a substitute for water changes 🧭 Personal Verdict If you want crystal-clear water without chemical dosing or constant maintenance, Purigen earns its spot. I’ve used it in planted tanks, fry setups, and even shrimp tanks—no drama, just clean results. It’s proper gear for anyone who wants clarity without compromise.

### ⭐⭐⭐⭐⭐ Excellent but also a warning!
*by R***S on 17 January 2016*

Ok so I recently had two problems one the filters that came with my rank were hopeless so I had to upgrade to a Fluval 406 which is great by the way. I tried to use as much of the older filter media as possible but fully expected a mini cycle and an ammonia spike due to the change. For the last week I had also been plagued by slightly cloudy water more noticeable when viewing the tank lengthways but still annoying ! So in went the Fluval about three days later in that went the Purigen. Readings taken before the Purigen showed a slight ammonia spike at .25 and nitrites also high and nitrates at about 40 so basically not good! 24 hours after the Purigen went in these were at 0! The other thing as you will see is it has visibly cleared the slight cloudiness after 48 hours this is almost completely crystal clear even when the tank is viewed length way so it works! Apart from this it has also done something which I don't really know how to describe but everything just looks more vibrant it's like I went from standard definition to HD. I think cost wise it's reasonable. Especially when compared to say Chemi Pure which to treat my tank would cost close to 40 pounds with one pouch if Purigen is actually more than enough for my 300 litre tank. I am still running normal carbon as this extends the life of the Purigen and also Purigen fits easily into my Fluval 406. Now for the caution bit. I was actually considering taking one star off for this because I don't think Seachem make this clear enough unless you do your own research which I did but many don't ! Once finding numerous threads on the internet about two serious issues I wrote to Seachem who have clarified and confirmed so this is straight from Seachem. Issue no 1 . Many water conditioners that are used today in water changes contain a slime coat element which contains amines. This could render the Purigen useless. To be on the safe side you need to use a water conditioner which does not have this ingredient like Seachem Prime, or remove the Purigen from the filter during water changes for about 24 to 48 hours. To be clear using a water conditioner that contains amines won't create any toxicity but will reduce the effectiveness of it and also saturate it so it is not capable of being recharged. Issue number 2. If you use a water conditioner containing amines which many do, then if you use this to regenerate your Purigen it will make it toxic and kill your fish. It is hard to know whether or not a water conditioner contains amines one that is safe is Seachem Prime. Amines are not necessarily listed on the ingredients as there are variations of this chemical. I know that the Fluval and Tetra water conditioners are both not safe to regenerate Purigen. What happens if you try to regenerate your Purigen with one of these water conditioners is a chemical reaction which will trigger highly toxic chloramine in your tank. As I do not intend to reuse or regenerate my Pugin this is not a problem for me but I have switched to using a different water conditioner just to be on the safe side. I really do think that Seachem should make this clear to people purchasing this product as the consequences could be catastrophic. I will continue to use this product as it seems to really help with water clarity and chemistry but I will be purchasing a new bag when this one runs out. I suggest if you do want to use this product switch to Seachems water conditions also either Prime or Safe to get the most out of it.

## Frequently Bought Together

- Seachem Indoor Purigen Organic Filtration Resin - Fresh and Saltwater 100 ml
- Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml
- Seachem Stability Fish Tank Stabilizer - For Freshwater and Marine Aquariums, 16.9 Fl Oz (Pack of 1)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-27*