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Filter Accessories
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  7. Seachem PhosNet Granular…
Seachem

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal - main product image
All-inclusive price — duties & taxes paid, no customs charges at delivery
₹6,460₹9,300

You save ₹2,840 (31%)

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Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal — brown
brown
₹6,460
₹9,300
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Estimated doorstep delivery by 20 Nov - 22 Nov from USA

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Effective Phosphate & Silicate Removal at a Competitive Price

About this item

Seachem PhosNet is a granular ferric oxide (GFO) media designed for aquarium filtration, available in India through crowcrowcrow, with high porosity and surface area for rapid phosphate and silicate removal. It effectively reduces unwanted nutrients, supporting water clarity and aquatic health.

PhosNet works by binding phosphates and silicates strongly, preventing their release back into the tank. Its high binding capacity ensures long-lasting performance, with easy rinsing before use. Suitable for canister filters, media chambers, and high flow areas, it is ideal for both freshwater and saltwater setups. Customers report clear water and stable phosphate levels after 4-day treatments, with minimal dust production for cleaner handling.

Imported directly from the USA, PhosNet offers reliable performance for Indian aquarists seeking science-backed solutions. Delivered via ExpressBox, duties included, in 11-13 days. Support your aquarium's health with trusted American filtration technology.

Key Features

  • REMOVAL: Seachem’s PhosNet is a granular ferric oxide (GFO) with high porosity, high surface area, and high binding capacity. It works to rapidly remove phosphates from silicates from both freshwater and saltwater.
  • BINDING: PhosNet will not release phosphates or silicates back into your tank or aquarium due to its ability to exhibit strong binding capabilities, consequently reducing phosphates and silicates to very low levels.
  • USE: The reduction of dust produced by PhosNet makes this GFO product easy to use every time you are wanting to remove phosphate from your aquarium.
  • FILTRATION: For best results, PhosNet should be rinsed before use and placed so as to maximize the flow of water through it but not so that it tumbles against itself in flow. It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter and a filter bag is recommended.
  • DIRECTIONS: Use 50g (½ cup) of PhosNet for every 200 L (50 US gallons) saltwater or 400 L (100 US gallons) freshwater. Leave PhosNet in place for 4 days, then test phosphate or silicate concentrates. As long as concentrations are above 0. 02 mg/L, the product is not exhausted as over-treating is not recommended.

Why choose this product

Science-Backed Filtration

Seachem’s PhosNet uses granular ferric oxide (GFO), a proven material for rapid phosphate and silicate removal. Its high porosity and surface area ensure effective binding, supported by decades of scientific research and hobbyist feedback. The product is designed for reliable, long-term performance, helping aquarists maintain water quality and clarity without leaching nutrients back into the tank.

Ideal for Hobbyists & Professionals

Supported by a company rooted in science and hobbyist experience, Seachem offers a trusted solution for aquarists seeking effective filtration. Suitable for high flow filters, canister setups, and media chambers, it supports healthy aquatic ecosystems. Skip if you prefer chemical-based solutions or have very low flow systems—this media excels in high flow environments with active biological filtration.

How to use

  • Rinse and Prepare — Rinse PhosNet thoroughly before use. Place in a filter bag or chamber, ensuring water flows through it without tumbling.
  • Install & Run — Insert into high flow area of your filter system. Run for 4 days, then test phosphate and silicate levels.
  • Test & Repeat — Test water after 4 days. Repeat cycle if phosphate or silicate levels remain above 0.02 mg/L, avoiding over-treatment.

Example scenarios

Typical situations where Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal helps — illustrative scenarios, not customer reviews.

1
Scenario 1
Illustrative example
Where it helps

Ravi, 35, Mumbai, struggled with algae blooms due to excess phosphates in his saltwater reef tank.

How this product helps

Used PhosNet in 4-day cycles, reduced phosphates, improved water clarity, saved ₹200 per cycle compared to local media.

Specifications

Composition

Active IngredientGranular ferric oxide
PorosityHigh
Binding CapacityHigh
AllergensNone

Usage

Serving Size50 g per 200 L saltwater or 400 L freshwater
Cost per use₹6,460 per unit
Shelf life after openingUnspecified
Reapplication math4 days per cycle, test phosphate/silicate levels
ContraindicationsSkip if phosphate levels are below 0.02 mg/L
Allergens / irritantsNone

How we compare

FeatureSeachem PhosNet GranularOthers
Binding CapacityHigh binding capacity of granular ferric oxide, effectively reduces phosphates and silicatesVaries by brand; typically lower binding capacity, may require frequent replacement
Application & UseSupports high flow filters, easy rinsing, 4-day treatment cycleOften designed for low flow, may need longer treatment or frequent rinsing
Price per unit₹6,460 per unit₹300-₹500 for similar 250g products in India
Support for freshwater & saltwaterYes, suitable for both environmentsMostly freshwater; saltwater support varies, check product specs

Product details

SKUnxu8775
GTIN00000116125208
BrandSeachem
Size250 g (8.8 oz)
ColorBrown
Pet TypeFish
Item FormGranules

About Seachem

Seachem is a globally trusted brand rooted in science, providing aquarium solutions for over 30 years, trusted by hobbyists worldwide.

Compliance & Legal

This is a dietary supplement; not intended to diagnose, treat, cure or prevent any disease.

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FAQ, See What Others Asked

What size aquarium filter should I choose for my tank?
Select a filter that can handle at least four times your tank volume per hour. For example, a 200L tank benefits from a filter supporting 800L/h flow for optimal phosphate removal.
What is the difference between mechanical, biological, and chemical filtration?
Mechanical traps debris; biological hosts beneficial bacteria; chemical, like PhosNet, removes phosphates and silicates, supporting water clarity and health.
Is PhosNet safe for freshwater and saltwater aquariums?
Yes, PhosNet is designed for both freshwater and saltwater tanks, effectively reducing nutrients without harming aquatic life when used as directed.
How long does a 250g pack last in my aquarium?
A 250g pack treats approximately 200-400 liters for 4 days, depending on phosphate levels. Test water after treatment to avoid overuse.
Can I use PhosNet daily?
No, PhosNet is designed for 4-day cycles. Daily use is unnecessary and may lead to over-treatment; test phosphate levels regularly.
How do I install PhosNet in my aquarium filter?
Rinse PhosNet before use. Place in a filter bag or media chamber, ensuring water flows through it without tumbling for maximum efficiency.

Frequently bought together

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal

This item:

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal

₹6,460

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal

This item

Seachem PhosNet Granular Ferric Oxide Aquarium Filter Media 250g | Rapid Phosphate & Silicate Removal

₹6,460

Total price:

₹11,040

You save ₹3,920 (26%) Extra

3 items selected

3 items

₹11,040

You save ₹3,920 (26%) Extra

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Spec
Price
₹6,460
₹9,300
₹2,470
₹3,340
₹2,110
₹2,320
₹3,210
₹4,450
₹5,340
₹6,220
₹40,030
₹60,970
₹1,900
₹2,040
Brand NameSeachemhyggerhyggerTetraFluvalMaster Equipmentdgdgbaby
Item FormGranulesN/AN/AN/AN/AN/AN/A
SourceUS RetailUS RetailUS RetailUS RetailUS RetailUS RetailUS Retail
Sold ByCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrowCrow
Imported from USA
₹6,460₹9,300

You Save ₹2,840

Estimated doorstep delivery by 20 Nov - 22 Nov from USA
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Packed & shipped
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₹19,380+ (3× the price)
₹6,460 locked, all-in
Hard to get the original US version in India
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