Seachem Purigen (100 mL)
$9.19
A rechargeable synthetic resin that polishes water to a sparkle and pulls out organic waste before it becomes nitrate. Bleach-regenerate it and reuse — not a single-use carbon.
Pros
- Fine polishing — a synthetic resin that removes organic waste and yellow tint for crystal-clear water
- Rechargeable — soak in dilute bleach to regenerate and reuse many times, so it lasts years
- Controls organics before they break down into nitrate, easing the load between water changes
- Comes with a mesh bag included and fits most filters — just lay the bag in the flow
Cons
- The bleach recharge is a careful, multi-rinse process — skip a step and you risk residue
- Exhausts faster in a dirty tank; it darkens as it loads and needs recharging
Score breakdown
Specifications
| Media Type | Chemical (synthetic resin) |
|---|---|
| Surface Area | High (bead resin) |
| Volume | 100 mL (treats ~100 gal) |
| Replacement Interval | Rechargeable - regenerate with bleach |
| Reusable | Yes - many cycles |
| Lifespan | Years with recharging |
| Compatible With | Any filter |
| Format | Beads in mesh bag |
| Dimensions | 100 mL bagged |
Alternatives
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The buy-it-once biological media: a porous ceramic with enormous high surface area for bacterial colonisation, inside and out. Rinse and reuse for years — it never needs replacing.
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Ceramic ring bio media with a porous internal maze for fast bacterial colonisation. Universal, well-priced and reusable — a proven default for any filter.
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Classic bulk activated carbon for removing tint, odour and leftover medications. A jug this size refills a hang-on-back for a fraction of the cost of branded carbon cartridges.
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