Seachem DeNitrate

Seachem DeNitrate Biological Filter Media for Nitrate Removal

Seachem DeNitrate is a natural, high-porosity biological filter media that removes nitrate, nitrite, ammonia and organic waste from freshwater and marine aquariums. Its porous structure supports aerobic bacteria at the surface and anaerobic bacteria at the core, so one media completes the full nitrogen cycle in a compact space.

Because it relies on bacteria rather than sulfur, DeNitrate carries no risk of hydrogen sulphide. It works the same way live rock does in nature, but forcing water through the media makes the process far more efficient.

Features & Benefits

• Removes nitrate, nitrite, ammonia and organic waste biologically
• Supports aerobic and anaerobic bacteria in a single media
• High surface area holds a dense, diverse bacterial population
• No hydrogen sulphide risk, unlike sulfur-based media
• Does not exhaust while nitrate remains controlled, so it rarely needs replacing
• Works in canister filters, sumps, drip trays, box filters and chemical filtration modules
• Suitable for both freshwater and marine tanks

Specifications

How to Use

Rinse off dust before first use, then place the media where water is forced to flow through it rather than around it, such as a canister filter, box filter or chemical filtration module. Use 500 mL per 100 to 200 L of water, depending on nitrate level and bio-load.

After several days, nitrate should begin to fall and settle around 4 to 5 mg/L. If nitrate is very high to start with, bring it below 20 mg/L with water changes first. While nitrate stays controlled, the media is not exhausted and does not need replacing.

Flow Rate Guide

Recommended For

• Aquariums with persistently high nitrate
• Heavily stocked freshwater and marine tanks
• Canister filter and sump setups with controllable flow