Saltwater Aquarium Nitrate Reducing Products

Reduce Nitrates In Your Saltwater Aquarium

It has been reported that high aquarium nitrate levels can cause a variety of issues for your fish including stress, lower immunity, decreased ability to reproduce, and algae growth. Excess nitrates (NO3) in a reef aquarium can be detrimental to the health of corals and many other invertebrates.

Aside from using a denitrator unit, a number of methods (i.e. the Vodka Method or macro algae in refugiums) and materials can be utilized to absorb or convert nitrate to a harmless substance (nitrogen...MORE gas). Here are some nitrate absorbing products which will help resolve high nitrate problems in saltwater aquarium and reef tank systems.

  • 01 of 08
    Seachem Denitrate 1 Liter
    Courtesy of Amazon

    Manufactured by SeaChem, De-Nitrate removes nitrates, nitrites, and ammonia. This product comes in loose form and must be contained in a mesh bag or in a filter chamber and placed in the water stream.

  • 02 of 08
    API Nitra-Zorb
    API Nitra-Zorb. Courtesy of

    A blend of natural and synthetic ion-exchange resins that selectively remove ammonia, nitrite, and nitrate. In new aquariums, Nitra-Zorb controls the level of toxic ammonia and nitrite during initial development of the biological filter. In established aquariums, it helps control sudden surges in ammonia and nitrite caused by the addition of new fish, or anytime ammonia or nitrite is detected.

  • 03 of 08
    Natural Nitrate Reducer Salt Water Conditioner
    Courtesy of Amazon

    Instant Ocean Natural Nitrate Reducer is the easy solution for long-term reduction and control of aquarium nitrate levels. Patented formula promotes the natural denitrification process of converting nitrate into nitrogen gas.

  • 04 of 08
    Poly-Filter. PriceGrabber

    With the Poly-Bio Filter Pad by Poly-Bio-Marine, Inc., water impurities like phosphate, nitrate, copper, silicate, and even ammonia are absorbed. The pads can be regenerated by simple rinsing in saltwater (saltwater use can be regenerated by the reverse, rinsing in freshwater). Simply roll or cut the pad to any shape, place it inside a canister filter or incorporate it into any type filtration system to easily remove troublesome elements in saltwater aquariums.

    Continue to 5 of 8 below.
  • 05 of 08
    Purigen. Courtesy of

    Purigen is a synthetic adsorbent, not a mixture of ion exchangers or adsorbents, but a unique macro-porous synthetic polymer that removes soluble and insoluble impurities from water. Purigen removes proteins, nitrites and nitrates, ammonia, and a broad spectrum of organics. Purigen darkens progressively as it exhausts, and is easily renewed by treating with household bleach.

  • 06 of 08
    Acurel Nitrate Reducing Pad
    Acurel Nitrate Reducing Pad. Courtesy of

    Acurel Nitrate Reducing Pad is a rigid gray polyfiber pad infused with a fast-acting nitrate reducer which reduces nitrate levels in aquarium water. The 1/2" thick pad traps free-floating debris while reducing and maintaining nitrates levels. The large pad surface area also acts as a biological filter base which promotes beneficial bacteria colonies. Simply cut the Acurel Nitrate Reducing Pad to fit any hang-on aquarium filters, canister filters, internal filters, wet/dry filters.

  • 07 of 08
    Red Sea Fish Pharm
    Courtesy of Amazon

    Red Sea NO3:PO4-X Biological Nitrate and Phosphate Reducer is a liquid form of carbon which stimulates certain species of natural bacteria which convert nitrate into nitrogen gas. A good protein skimmer should be used be used in the aquarium system when using this product in order to collect the excess bacteria and byproducts which will be formed. See "Reducing Nitrates With the Vodka Method" for more information.

  • 08 of 08
    DrTim's Aquatics
    Courtesy of Amazon

    DrTim's Aquatics Bashsea Pellet Master is a heavy duty acrylic media reactor perfect which utilizes NP-Active Pearls to remove both nitrates and phosphates from your aquarium water. The large reaction chamber is designed to handle a high media volume. The non-clogging design provides even water flow to tumble gently media for maximum media-water contact.

    The Reactor Kits are available in three sizes and include everything (including pumps and plumbing material) needed to set up and operate.

    • PM-...MOREI Reactor Kit: For aquariums systems up to 75 gallons.
    • PM-II Reactor Kit: For aquarium systems up to 150 gallons.
    • PM-III Reactor Kit: For aquarium systems up to 300 gallons.
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