Seachem Matrix Filter Media
by Seachem
Learn moreDescription:
Purigen is a premium synthetic absorbent that is unlike any other filtration product. It is not a mixture of ion exchangers or absorbents, but a unique macro-porous synthetic polymer that removes soluble and insoluble impurities from water at a rate and capacity that exceeds all others by over 500%. Purigen darkens progressively as it exhausts and is easily renewed by treating with bleach.
Key Benefits:
- Highest organic removal capacity
- Possesses enhanced capacity owing to its vast surface area; both spherical and macroreticular
- Helps control ammonia/nitrite/nitrate
- Colour changes as it exhausts; easily regenerated
Directions:
Rinse before use.
Use in a fine mesh (180 micron or less) filter bag such as Seachem’s The Bag™.
For best results, Purigen® should be placed so as to maximize the flow of water through it. It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter.
Each 250 mL treats up to 1,000 L (250 US gallons) for up to six months.
Exhaustion is indicated by a pronounced discoloration of the beads to dark brown or black.
Regeneration Soak in a 1:1 bleach:water solution for 24 hours in a non-metallic container in a well ventilated area and away from children. Use regular 8.25% hypochlorite household bleach (non-scented, no dyes, do not use a splash-less bleach). Rinse well, then soak for 8 hours with a solution containing 4 tablespoons of Prime®, or equivalent dechlorinator per cup of water. Rinse well. For freshwater use, soak for 4 hours with a solution containing 2 tablespoons of buffer per cup of water (Discus Buffer®, Neutral Regulator®). Original color and full activity should now be restored and Purigen® is ready for reuse.
Caution: some slime coat products may permanently foul Purigen® and render regeneration difficult. Do not reuse if odour of bleach/chlorine is detectable. In case of doubt, soak beads in small quantity of water and test for residual chlorine with a chlorine test kit.
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All orders are dispatched from Petdirect’s Auckland and Christchurch warehouses, offering fast, reliable delivery throughout New Zealand.
Standard Shipping
- Next working day delivery for most main centres
- 2 business days to regional areas
- 3 business days to rural addresses
Free shipping on orders $79.00 and over
Flat $5.90 delivery for smaller orders
Evening Express
This is ideal for urgent pet supply needs within the Auckland and Christchurch regions.
Available in eligible Auckland and Christchurch suburbs only.
- Same-day delivery if you order before 2pm Monday–Friday.
- Cost is $15.95 per order.
- Orders placed after 2pm or during weekends/public holidays will be delivered the next business evening.
- Eligible addresses can select evening express shipping at checkout.
See our shipping & delivery page for more information
You have 30 days to return products in original condition if you change your mind. Courier costs apply for change-of-mind returns.
If we made a mistake or your order is faulty or damaged, we’ll make it right — and cover the return shipping.
In-person returns are welcome at our Auckland store or Christchurch warehouse (by appointment).
See our full returns & refunds policy for more detail