is it meant to have a rotten fish smell?

It does smell a bit when first opened, its fine to use.

Heard so many good reports about this product but can it be used in internal filter, i have Juwel Bioflow 3 in 125L tank.

I was able to fit the sachet into one of the side housings inside a Fluval U2 pump (as supplied with my 90 litre tank). All I had to do was remove the sponge and carbon pad. It’s only been running 5 hours and I can see a difference already. I also dosed with Seachem Pristine.

How many of this for a 510 liter tank grams ???

Its treating up to 1000l so one should be enough you may need to recharged it quicker due your tank size

Purigen Freshwater 250 Ml | Desertcart Faroe Islands

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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420 kr

Duties & taxes included

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Sold byAmazon Faroe IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

♻️ Elevate your aquarium game with Purigen’s HD water clarity—because your fish deserve the spotlight!

SMART COLOR INDICATOR - Know exactly when to regenerate with the intuitive color-change from off-white to dark brown/black.
UNIVERSAL COMPATIBILITY - Fits seamlessly into canisters, HOBs, internals, and sumps with a fine media bag for optimal flow.
BALANCED WATER CHEMISTRY - Targets dissolved organics without stripping essential minerals—keeping your aquatic ecosystem stable.
ECO FRIENDLY COST EFFECTIVE - Reusable beads regenerate easily with bleach, saving you money and reducing waste.
CRYSTAL CLEAR WATER EVERY TIME - Purigen’s ultra-efficient organic removal delivers sparkling clarity that makes your aquarium pop.

Seachem Purigen Freshwater 250 ml is a premium filtration media designed to remove dissolved organics with unmatched efficiency. Its unique bead form changes color to signal exhaustion, allowing easy regeneration via bleach soak for multiple reuse cycles. Compatible with various filter types, Purigen enhances water clarity, stabilizes chemistry by preserving essential minerals, and controls ammonia, nitrite, and nitrate levels—making it the go-to choice for aquarists seeking pristine, show-quality water.

Specifications

ASIN	B000255PJE
Allergen Information	Yam Free
Best Sellers Rank	1,279 in Pet Supplies ( See Top 100 in Pet Supplies ) 5 in Aquarium Water Treatments
Brand Name	Seachem
Country Of Origin	USA
Customer Reviews	4.7 4.7 out of 5 stars (15,746)
Global Trade Identification Number	00000116016605, 00015568976827
Included Components	Filtration
Item Form	Beads
Item Type Name	Seachem Purigen Freshwater, 250 ml
Item Weight	227 g
Liquid Volume	250 Millilitres
Manufacturer	Seachem
Manufacturer Part Number	75185
Model Number	166
Number of Items	1
Number of Packs	1
Pet Type	Fish
Product Warranty	3 years
Target Species	Fish
UPC	015568976827 000116016605
Unit Count	250.0 millilitre

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420 kr

Duties & taxes included

In stock

Sold byAmazon Faroe IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Faroe Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!