Seachem Purigen 250 ml 
Seachem PhosNet 250 gm
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Seachem PhosNet is a low-dust granular ferric oxide (GFO) that rapidly removes phosphate and silicate with high porosity and capacity.
Description
SEACHEM PhosNet is a granular ferric oxide (GFO) with high porosity, high surface area and high binding capacity. It will rapidly remove phosphates and silicates from both freshwater and saltwater and will not release them back into your aquarium. It exhibits stronger binding than most competing products and consequently can reduce phosphates and silicates to very low levels. This chemical filter media also offers less dust and thus is easier to use than most competing GFO products.
Directions
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. Use of a filter bag such as The Bag is recommended.
Use 50 g (1/2 cup) for every 200 L (50 US gallons) saltwater or 400 L (100 US gallons) freshwater. Leave product in place for 4 days, then test phosphate or silicate concentrations with either MultiTest Phosphate or MultiTest Silicate. If the concentration of the component you are trying to decrease has not dropped to around 0.02 mg/L, then replace the PhosNet, otherwise leave in place until levels begin to climb again. As long as concentrations remain under control, the product is not exhausted. Over treating is not recommended. PhosNet is not an exchange resin and does not release anything into the water. It does not leach phosphate or silicate back into the water and may be removed, dried, and returned to service until exhausted. Continuous use of small quantities is better than intermittent use of larger quantities.
Specifications
A granular ferric oxide (GFO) that removes phosphate and silicate from fresh and salt water, and holds them — it does not release them back as it loads.
Capacity: 1.41 mg of phosphate per gram, the highest of Seachem’s phosphate removers.
Coverage: 50 g (about half a cup) treats 200 L of salt water or 400 L of fresh water.
Typical service life: four to five days where phosphate is high. Rinse before use, keep it out of media reactors, and replace when phosphate stops falling. It cannot be regenerated, though it may be dried and returned to service until spent.
Freshness & Storage
Every batch we dispatch carries a minimum of 6 months’ remaining shelf life. Store this product in a cool, dry place away from direct sunlight, with the cap or inner foil closed tightly after each use.
Filter media and substrates carry no manufacturing or expiry date — their working life begins on first contact with water, not on the shelf.
Returns & Replacement
Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.
If your item arrives defective or damaged, message us on WhatsApp with your order number, or email us if you would rather, and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.
Full terms are on our Cancellation & Returns page.
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