Seachem Renew 100ml Bagged (SC-85)


New product

  • Filtration media for planted and marine tanks
  • Phosphate-free carbon substitute
  • High pore for maximum organic removal
  • Does not leach phosphate
  • No impact on trace minerals and important nutrients

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$ 8.20

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Brand: Seachem

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Seachem Renew 100ml Bagged (SC-85)

Seachem Renew is a filter media that replaces activated carbon, ideal for controlling ammonia, nitrates and phosphates in reef and planted aquarium. Being phosphate-free, Seachem Renew is a great substitute for carbon filtration media.


Renew is ideal for use in systems where phosphate released from all activated carbons poses a problem. Renew is also less aggressive than carbon, making it well suited for reefs and planted aquaria. It is also beneficial for use in soft water aquaria where the pH-raising property of many carbons is not an asset. Renew will remove organics and particulates in the sub-micron range; it will also help control ammonia, nitrates, and phosphates.


Renew should be used in exactly the same manner as activated carbon. Use 250 mL for each 120-160 L (30-40 US gallons). For best results, Renew should be placed so as to maximise the flow of water through it. Use in a filter bag such as the Zip Bag. Although Renew is clean, it is advisable to rinse before use. It lasts about the same as carbon (4-6 weeks).


Will Renew remove medications from aquarium water? And how efficient if renew at removing proteins?

A: Yes, Renew will remove proteins and medications from the water to a limited extent. Renew is an economical source of carbon but if you are looking to pull out medications I would recommend MatrixCarbon or if you are pulling out heavy metals or copper, than use CupriSorb.

I see that MatrixCarbon is more aggressive at filtration and has a higher capacity than Renew. In what situations would I want to use Renew?

A: In planted or reef tanks, it can be advantageous to leave some of the organics in the tank so they are available to fish, plants, or corals. In these situations, a media like Renew allows for control of organics without total depletion as with more aggressive medias. Additionally, Renew will leach no phosphate into the tank at all, which makes it excellent for use in situations where phosphates are being tightly controlled.

Seachem Online Shop

N30 is the authorised dealer in Singapore for Seachem aquarium supplies.

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Seachem Guide

Which Seachem products do I need?

From treating fish infections to solving water and algae problems, Seachem has the right products to restore your aquarium.

Seachem - Fish Disease Treatment

A sick fish can spread infection quickly within an aquarium and threaten the life of other aquatic inhabitants. It is critical to accurately diagnose fish disease and dose the right medications as early as possible.

common fish diseases symptom guide - seachem medication guide

Seachem - Solve Aquarium Problems

Sometimes, a small change in water chemistry, alkalinity and acidity could cause problem for the aquarium. Below are some of the common problems:

  • Cloudy water
  • Algae over growing
  • Ammonia, nitrite, nitrate toxicity
  • Detritus or slime

Is your aquarium facing any of the above issues? If yes, use this guide to find the right Seachem products to restore your aquarium.

seachem products for common aquarium problems

About Expiration of Seachem Products

Many Seachem products do not have an expiration date by virtue of the ingredients used to make the products. Many mineral and non-organic components are shelf-stable, and do not have a finite shelf-life, and may be used for years with continued efficacy. If a product does not have a printed date of expiration, it can safely be assumed that the product does not expire.

expiration date of seachem products

About N30

About N30 Tank

N30 Tank Pte. Ltd. is a leading manufacturer of custom-made fish tanks cabinets. As a tank maker, we supply aquarium cabinets to homes and offices locally as well as ship orders worldwide.

N30 provides expertise in the construction of large acrylic aquariums, such as those in Underwater World (Resort World Sentosa). We supply customised storage tanks to fish farms such as Qian Hu, and to major restaurants. The N30 brand name is trusted for quality workmanship in the industry.

N30 has developed unique glass-sealing techniques, which allows us to produce very large tanks (such as 30-feet long) without issue of water leakage. For all custom-made fish tanks, N30 assures customers of Five Years Warranty against water leakage.

To support the needs of aquarium hobbyists, N30 is also offering a wide range of aquarium accessories such as filters, pumps, lighting, wave makers, skimmers... for sale online. We encourage customers to browse and shop online at for accessories. It is convenient and we provide free delivery for orders (see the online store terms and conditions for details).

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N30 members earn five points per dollar spent online at Each point is worth S$0.01 in cash value.

Convert points into eVouchers redeemable for discounts on your orders.

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When you purchase S$100 of aquarium accessories online at, you will earn 500 points in your N30 account. You may convert the 500 points into an eVoucher worth S$5. To use this eVoucher on your next order, simply enter the unique eVoucher code in your shopping cart before you check out. That's all!

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