Is Purigen worth it over activated carbon?

For most tanks, yes. Purigen removes organics and ammonia that carbon leaves behind, and it can be recharged instead of thrown away, so the cost per month is lower.

How do I recharge Purigen?

Soak it in a 1:1 bleach and water mix for 24 hours, rinse, then soak in water with a dechlorinator until the bleach smell is gone. Let it dry before returning it to the filter.

How much does 1 L treat?

One liter treats roughly 400 gallons of freshwater or 100 gallons of saltwater. Use less in small tanks and keep good flow through the bag.

Can I use it with medication?

No. Purigen absorbs the medication along with organics. Remove it during treatment and put it back once the course is finished.

When is the price lowest?

The only new listing tracked is $13.98 at eBay as of November 4, 2026. Watch for multipacks, which often cost less per liter than single bottles.

Where is the Seachem Purigen 1 L Filter Media cheapest?

At Walmart, for $64.31, as of our latest check.

What do buyers say about the Seachem Purigen 1 L Filter Media?

Rated 4.8 out of 5 from 3,300 ratings.

Where can I buy the Seachem Purigen 1 L Filter Media?

2 stores we checked sell it, including Walmart, eBay.

Seachem Purigen 1 L Filter Media

4.8

Best price now

$64.31at WalmartObserved at 1:15 AM

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our shopping agent

Our take on the Seachem Purigen 1 L Filter Media

Seachem Purigen is a synthetic polymer filter resin that removes organic waste, discoloration and ammonia from aquarium water. It is sold as a 1 L bottle of beads that go in a media bag inside a filter, and it can be regenerated with bleach instead of replaced. The best new price is $13.98 at eBay as of November 4, 2026, the only new listing tracked, so there is no recent range to compare it against.