Seachem de*nitrate 250mL
Seachem de*nitrate is a highly porous filtration media designed to remove nitrates, nitrites, and ammonia from aquarium water, making it ideal for both freshwater and saltwater tanks. The unique structure of de*nitrate allows beneficial bacteria to colonize within its pores, facilitating the biological removal of nitrogen compounds, which helps in maintaining healthy water conditions for aquatic life.
Key Benefits:
- Nitrate Reduction: de*nitrate effectively lowers nitrates, which can build up in aquariums and cause stress or harm to fish and invertebrates.
- Dual Functionality: It acts as both a biological filter media and a nitrate remover, offering a long-term solution for water quality maintenance.
| Specification | Value |
|---|---|
| Volume | 250mL |
| Application | Freshwater and saltwater aquariums |
| Removes | Nitrates, nitrites, ammonia |
| Filter Type | Biological filtration media |
FAQ
Can de*nitrate be used in both freshwater and saltwater tanks?
Yes, Seachem de*nitrate is suitable for both freshwater and saltwater aquariums.
How long does it take to see a reduction in nitrates after adding de*nitrate?
The time to see nitrate reduction varies depending on tank conditions and bioload, but beneficial bacteria typically establish within a few days to a week.
Does de*nitrate need to be replaced regularly?
Please contact customer service

Max Hart –
I’ve used de*nitrate in my 55-gallon freshwater tank for three months. Nitrate levels dropped from 80 ppm to under 10 ppm. The filter runs smoothly and the water clarity improved noticeably. No fish stress reported.
Madeleine Oliver –
Works well in a reef tank. After adding de*nitrate, nitrate levels stabilized and didn’t spike during water changes. The media holds up well and doesn’t clog easily.
Amanda Manning –
Great product for maintaining stable water chemistry. I added it to my saltwater tank and saw a clear reduction in nitrate over two weeks. Easy to install and effective.
Warren Russell –
The porous structure helps bacteria grow, which is exactly what I needed. I’ve used it in both tanks and it’s become a staple in my filtration routine.