Phosfiltrum

🧪 Usage Instructions

Initial Setup (First-time use):

• Rinse the Phosfiltrum in RO or aquarium water before use.
• Place in the included mesh bag and put it in a high-flow filter zone (e.g., canister filter, media chamber, box filter, trickle filter). Avoid direct tumbling.
• Dosage: Use 50 g (~¼ cup) per 300 L saltwater or 600 L freshwater.
• Leave for 4 days, then test phosphate or silicate levels with an appropriate kit.

Maintenance Dosing

• Replace media if phosphate/silicate levels have not dropped to ~0.02 mg/L after 4 days; otherwise, leave in place until levels begin to rise.
• Dry and reuse Phosfiltrum until fully exhausted—it’s not an exchange resin.
• Continuous low-dose usage is preferred over intermittent high-dose treatment to maintain control without over-treatment

Frequently Asked Questions (FAQ)

Q: Why is Phosfiltrum hard and dust-resistant?
A: It’s formulated as high-density granular ferric oxide, making it much harder and less fragile than other GFOs—meaning it won’t break into fine particles in your tank.

Q: What is its phosphate binding capacity?
A: It binds 1.71 mg of PO₄ per gram, the highest capacity of any GFO when tested under realistic aquarium pH (~8.4).

Q: Can I use it in a media reactor?
A: You can, but only with gentle flow—agitation can create dust. Using it in a filter bag is generally preferred for safety and longevity.

Q: Will it leach phosphate/silicate back into the water?
A: No. It’s not an ion-exchange resin, and it does not release any bound contaminants. You can remove, dry, and reuse it until fully spent.

Q: Why not use larger amounts occasionally?
A: Over-treatment is not recommended. Aquavitro advises consistent use of small quantities for better, more stable control.

You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.