---
product_id: 10255508
title: "AquaMaxx Phosphate Out Granular Ferric Oxide Filter Media GFO - 2 Quart"
brand: "aquamaxx"
price: "€ 6.50"
currency: EUR
in_stock: false
reviews_count: 6
url: https://www.desertcart.hr/products/10255508-aquamaxx-phosphate-out-granular-ferric-oxide-filter-media-gfo-2
store_origin: HR
region: Croatia
---

# AquaMaxx Phosphate Out Granular Ferric Oxide Filter Media GFO - 2 Quart

**Brand:** aquamaxx
**Price:** € 6.50
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** AquaMaxx Phosphate Out Granular Ferric Oxide Filter Media GFO - 2 Quart by aquamaxx
- **How much does it cost?** € 6.50 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/10255508-aquamaxx-phosphate-out-granular-ferric-oxide-filter-media-gfo-2)

## Best For

- aquamaxx enthusiasts

## Why This Product

- Trusted aquamaxx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

AquaMaxx Phosphate Out is a granular ferric oxide adsorptive filter media that removes phosphate from aquarium water. Phosphate is a fuel for algae growth and can also inhibit a coral`s ability to utilize calcium in water. Phosphate Out does not leach phosphate back into aquarium water after it has been absorbed by the media.For best results, use AquaMaxx Phosphate Out inside a canister, hang-on back or other aquarium filtration system. Using a filter media bag is strongly recommended. Phosphate Out can also be used in fluidized (up-flow) media reactors. A ball valve is required to regulate a slow flow rate through the filter to prevent granules from becoming pulverized.Dosage Rinse before use. Use 1/2 cup per 50 gallons for saltwater aquariums. Test phosphate levels and replace media when levels begin to rise (approximately every 1-3 months). As with all ferric oxide media, alkalinity levels may drop when used. Be sure to monitor alkalinity and adjust as needed

## Features

- Rinse before use
- Use 1/2 cup per 50 gallons for saltwater aquariums
- Test phosphate levels and replace media when levels begin to rise (approximately every 1-3 months)
- As with all ferric oxide media, alkalinity levels may drop when used. Be sure to monitor alkalinity

## Images

![AquaMaxx Phosphate Out Granular Ferric Oxide Filter Media GFO - 2 Quart - Image 1](https://images-na.ssl-images-amazon.com/images/I/61oUH0LXbIL.jpg)

## Customer Reviews

### ⭐ 







  
  
    Don't buy it.
  

*by B***8 on Reviewed in the United States on April 19, 2019*

Dont order this. My phosphates went up when I started using this. Unplug my reactor and my phosphates went down. Buy real GFO, not this powder crap. Only reason I'm leaving this review is I'm back on Amazon looking for better gfo.

### ⭐ 







  
  
    Don’t recommend
  

*by W***E on Reviewed in the United States on December 14, 2018*

This product is very fine and leaves a brown film on the inside of your tubes.Threw the product away, replaced the tubing to media reactor and ordered real GFO from Bulk Reef Supply.

### ⭐⭐⭐⭐ 







  
  
    nice, not dusty just a quick rinse and ready.
  

*by B***N on Reviewed in the United States on September 18, 2018*

Great GFO, not full of dust. Good price

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/10255508-aquamaxx-phosphate-out-granular-ferric-oxide-filter-media-gfo-2](https://www.desertcart.hr/products/10255508-aquamaxx-phosphate-out-granular-ferric-oxide-filter-media-gfo-2)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-07-06*