Will this work in freshwater aquarium

Yes, it will remove phosphate from freshwater.

How does this compare to the gfo from brs?

Similar, looks the same. My Phosphates are at 0 so it is doing its job. I change it every three weeks so not sure about longevity, I think the BRS product only needs to be changed every 2 months, so that may be something to look into.

Can this be used in a fresh water tank with a sump?

Yes, this will work in freshwater with a sump. You will want to place the GFO in a mesh bag or media reactor, to keep it contained.

How often should you change the GFO out?

Check your phosphate. When the phosphate goes up change it out. You want it to be low but not zero. You will get cyno blooms then.

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TL Reefs GFO, 2lb

Product ID: 89211045

Details

Brand
TL Reefs
Item Form
Granules
Item Weight
0.9 kg
Liquid Volume
50 gallons
Unit Count
2 Pounds

🧪Permanently bonds phosphate

♻️No leaching back into water

⚖️Precise dosing: ½ cup/50 gal

$176.88

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Description

🌊 Keep your reef pristine—phosphate-free perfection in every grain!

TRUSTED BRAND - Lanxess-backed formula with 4.2-star rating from 277 reef enthusiasts
EASY MONITORING - Track phosphate levels and replace only when needed—smart maintenance
PRECISION DOSING - Use just ½ cup per 50 gallons for optimal water clarity
PHOSPHATE LOCKDOWN - Permanently traps phosphate to keep your reef thriving
ZERO LEACH GUARANTEE - No harmful phosphate release ensures stable aquarium chemistry

TL Reefs GFO Phosphate Remover is a granular ferric oxide media designed for saltwater aquariums. It permanently bonds phosphate, preventing it from leaching back into the water, ensuring crystal-clear, healthy reef environments. Ideal dosing is ½ cup per 50 gallons, with phosphate levels monitored for timely replacement. Trusted by hobbyists and backed by Lanxess Corporation, this 2-pound pack supports vibrant marine life and optimal water quality.

Specifications

ASIN	B0773Q8BS4
ASIN	B0773Q8BS4
Best Sellers Rank	#49,320 in Pet Supplies ( See Top 100 in Pet Supplies ) #429 in Aquarium Water Treatments
Brand Name	TL Reefs
Customer Reviews	4.2 4.2 out of 5 stars (277)
Date First Available	November 2, 2017
Item Form	Granules
Item Weight	0.9 kg
Item model number	43237-2
Liquid Volume	50 gallons
Manufacturer	Lanxess Corporation
Manufacturer	Lanxess Corporation
Manufacturer Part Number	43237-2
Model Number	43237-2
Number of Items	1
Package Dimensions	10.63 x 8.11 x 2.24 inches; 1.98 pounds
Pet Type	Fish
Target Species	Fish
UPC	600150909965
Unit Count	2 Pounds

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